List of commercial video games with later released source code explained

This is a list of commercial video games with later released available source code. The source code of these commercially developed and distributed video games is available to the public or the games' communities.

Background

Commercial video games are typically developed as proprietary closed source software products, with the source code treated as a trade secret (unlike open-source video games).[1] When there is no more expected revenue, these games enter the end-of-life as a product with no support or availability for the game's users and community.[2]

In several of the cases listed here, the game's developers released the source code expressly to prevent their work from becoming lost. Such source code is often released under varying (free and non-free, commercial and non-commercial) software licenses to the games' communities or the public; artwork and data are often released under a different license than the source code, as the copyright situation is different or more complicated. The source code may be pushed by the developers to public repositories (e.g. SourceForge or GitHub), or given to selected game community members, or sold with the game, or become available by other means.Source code availability in whatever form allows the games' communities to study how the game works, make modifications, and provide technical support themselves when the official support has ended,[2] e.g. with unofficial patches to fix bugs or source ports to make the game compatible with new platforms.

Some developers that have released their source code have concluded that, in general terms, such action has not been harmful and even beneficial, among them Alec Holowka (Aquaria), Adam Saltsman (Canabalt),[3] John Carmack (Wolfenstein 3D, Doom, Quake),[4] Brian Hook (Quake II),[5] and Terry Cavanagh (VVVVVV).[6] Wolfire Games also noted (along with Saltsman) that releasing the source code didn't reduce sales.[3] [7] However, releasing the source code may and has led to clones using the original proprietary assets from the game, with two notable examples of games having clones thanks to the source release being Canabalt and Lugaru HD. Although Saltsman has noted that those clones can be removed from storefronts with a DMCA takedown notice,[3] Jeff Rosen, co-founder of Wolfire Games, has recognized that such practices may discourage game developers from releasing their code.[8]

Lists

Open engine and game data

The games in this table were released under a free and open-source license with free content which allows reuse, modification and commercial redistribution of the whole game. Licenses can be public domain, GPL, BSD, Creative Commons, zlib, MIT, Artistic License or other (see Comparison of free and open-source software licenses).

TitleFirst releaseSource code releaseGenreEngine licenseContent licenseOriginal developerAdditional information
Abuse19952003Run and gunPublic domain softwarePublic domain and Proprietary*Crack dot ComGame source code was released as public domain along with the shareware-released media files.[9] Only shareware data, excluding the sound effects, is in the public domain; the rest is proprietary. In 2016 a community developer released a "20th anniversary source port"[10] [11] which enabled custom resolutions, OpenGL rendering, Xbox 360 controller support and fixed the music.
Adventureland19781980Text Adventure gamePublic domain softwarePublic domainScott AdamsScott Adams Adventureland's[12] source code was published in SoftSide magazine in 1980[13] and the database format was subsequently used in other interpreters such as Brian Howarth's Mysterious Adventures series.[14]
Alien Bash I+II19932014Run and gunpublic domain softwarepublic domain[15] Glen CummingGlen Cumming provided media and material of his Amiga games AlienBash and AlienBash II to the fan community, who was able to restore source code in 2014.[16]
Ant-Eater19832021MazeMITMITEddy FriesOn March 30, 2021, Kay Savetz uploaded the source code for Ant-Eater (a Dig Dug clone), Princess and Frog (a Frogger clone), Sea Chase, and two unreleased video games by Ed Fries (of Halo 2600 fame) to GitHub under the MIT license with permission of Fries.[17]
AstroMenace (now OpenAstroMenace)20062007ArcadeGPL-3.0-or-laterCC BY-SA 3.0ViewizardBased on AstroMenace which was released in February 2007 as shareware for Windows and freeware for Linux.[18] Also the source code of another Viewizard game, the puzzle collection Memonix, was released.[19]
Beyond the Titanic19862009Text adventureGPL-2.0-or-laterGPL-2.0-or-laterApogee SoftwareGame source released on March 20, 2009.[20]
Bird Strike19842021Shoot 'em upGPL-3.0GPL-3.0Andy FrigaardOn June 20, 2021, the source code for Bird Strike for the BBC Micro (one of the first releases by Firebird Software) was uploaded to GitHub under the GPLv3 by Andy Frigaard, the original developer.[21]
Blades of Exile19972007RPGGPL-2.0-onlyGPL-2.0-onlySpiderweb SoftwareSource code and artwork was released by Jeff Vogel (Spiderweb Software) under a GPL license in June 2007.[22]
Clonk series (now OpenClonk)19942010/2014Action, RTS, PlatformISCCC BY-SA 3.0RedWolf Design / Matthes BenderFor the series (Clonk 1, Clonk 2 Debakel, Clonk 3 Radikal, Clonk 4 World, Clonk Planet, Clonk Endeavor and Clonk Rage) the C++ source code was released under the "Clonk Source Code License (ISC license)".[23] The content of the original game series was released under the CC BY-NC.[24] Based on Clonk Rage code base the community continues the development as OpenClonk under ISC license and content as CC BY-SA.
Colobot20012012Educational game, RTSGPLv3GPLv3Epsitec SAGame source released on March 26, 2012.[25]
Colossal Cave Adventure19762000/2005 (?)Text AdventurePublic domain software[26] [27] [28] / BSD (2017)no artwork (Public domain software)Will CrowtherSource code variants are at least available as far back as 2000.[29] An authentic version was retrieved in 2005 "from a backup of Don Woods's student account at the Stanford Artificial Intelligence Lab (SAIL)". In February 2017 Eric S. Raymond was involved in the release of version 2.5 under the BSD license, the last release by the original author alone.[30] [31] [32]
Cylindrix19962001Arcade, ShooterLGPL-2.0-onlyLGPL-2.0-onlyGoldtree Enterprises / SoftdiskAround December 2001 the games was ported from DOS to Windows and released under the LGPL to the public.[33] [34]
Cytadela (or The Citadel)19952006FPSGPL-3.0-or-laterGPL-3.0-or-laterVirtual DesignUpon its retail release, Cytadela received generally favorable reviews.[35] In early 2006 the original Cytadela developer offered the Amiga source code of the FPS game to the community, which started a conversion project hosted on SourceForge.[36] [37] [38] Ported to several platforms, latest version released in 2013.
Dandy19832018Dungeon crawlApache-2.0Apache-2.0John Howard PalevichIn March 2018 the source code for the Atari 8-bit version was released by Kevin Savetz with permission of Palevich.[39] It was also uploaded to Palevich's own GitHub repository for Dandy which uses the Apache License 2.0, where he also maintains reverse engineered ports to a variety of programming languages.[40]
Dragonfire19822003actionpublic domain softwarepublic domainImagic / Bob SmithSource code of this Imagic Atari 2600 game was released by developer Bob Smith on May 24, 2003, into the public domain.[41] [42] [43] Many more Atari games got disassembled and commented by the Atari community.[44]
Duelyst20162023CCGCC0Counterplay GamesAlmost three years later after the servers were shut down,[45] Counterplay Games released the entire game (source code and assets), built on top of Backbone.js, to the public domain under the CC0 license on GitHub.[46]
Eat The Whistle - France 9819982004Sports gameGPL-2.0-only[47] GPL-2.0-onlyHurricane StudiosThe France 98 football Simulation video game was released for the Amiga in 1998. Around 2004 Eat the Whistle was released under the GPL-2.0-only on SourceForge.[48] Later ported to many other platforms.[49]
Escape Towards The Unknown19982004Point and click adventureGPL-2.0-only[50] GPL-2.0-onlyHurricane StudiosAround 2004 Escape Towards The Unknown was released under the GPL-2.0-only on SourceForge, together with the Eat The Whistle.[51] [52] Later ported to many other platforms.
Fish Fillets (now Fish Fillets NG)19982002PuzzleGPL-2.0-or-laterGPL-2.0-or-laterALTAR GamesReleased commercially as Fish Fillets in 1998. Source released in 2002 under the GPL.[53]
Gladiator19952002top down perspective action gameGPLv2GPLv2Forgotten Sages GamesReleased in 1995 as DOS shareware game,[54] in 2002 the game's source code was released under GPL by the developers. Development and porting by the game's community continued on SourceForge under the name OpenGlad.[55]
Glitch20092013MMOCC0 (client and other parts)CC0TinyspeckIn 2013, one year after the MMO was shut down, most of the artwork and parts of the code were released under the CC0 license.[56] [57]
God of Thunder19932020Puzzle video gamePublic domain softwarePublic domain (music and sound effects)
Freeware (game graphics)
Adept SoftwareOn March 27, 2020, Ron Davis released the source code and sound assets as public domain on SourceForge.[58]
Gravity Force 219942008Multidirectional shooterCC BY-SA 4.0CC BY-SA 4.0Jens Andersson & Jan KronqvistOn September 21, 2008, the developers of the Amiga shareware title Gravity Force 2 released the source code for "nostalgic interest" without specified license.[59] In April 2017 the authors clarified the game and source code license as CC BY-SA 4.0.[60]
Habitat19852016early MMORPGMITMITRandy Farmer and Chip Morningstar/Lucasfilm GamesThe Museum of Art and Digital Entertainment received the game's source code from its original developers,[61] and restored the code in a Hackathon.[62] In July 2016, the source code was uploaded to GitHub under MIT license.[63] [64]
Halloween: The New Nightmare2004[65] 2021FPSGPLv3GPLv3Jadeware[66] Commercial indie game first released online and by mail order. Released on to GitHub in 2021.[67]
Inside a Star-Filled Sky20112011Top-down shooterPublic domain softwarePublic domainJason RohrerInside a Star-filled Sky, for purchase for $12,[68] was put by developer Jason Rohrer into public domain,[69] like many other of his games.[70]
Kaiser II19882003economical simulationGPLGPLCarsten StrotmannIn 2003 Kaiser II author Carsten Strotmann released the source code under the GPL as Free Software.[71] [72]
Kroz19872009MazeGPL-2.0-or-laterGPL-2.0-or-laterApogee SoftwareGame source released on March 20, 2009.
Lemonade Stand19731979Business simulation gamePublic domain softwareno artwork (Public domain software)Bob Jamison, Charlie Kellner / MECCThe Applesoft BASIC source code was available since 1979.[73] [74] The game was later ported to modern REALbasic and released as free and open-source software for many platforms like Windows and MacOS.[75]
Lugaru20052010 / 2016 (assets)Action-adventure gameGPL-2.0-or-laterCC BY-SA 3.0Wolfire GamesOpen sourced with the first Humble Indie Bundle by Wolfire Games.[76] In November 2016 David Rosen relicensed all assets under the open content CC BY-SA 3.0 Creative Commons license which makes Lugaru a fully free video game.[77] In begin 2017 an open source HD version followed.[78] [79]
Maelstrom19921995/2010Shoot 'em upGPL-2.0-onlyCC BY 3.0Ambrosia SoftwareAsteroids clone. 1995 source released under GPL. In 2010 Andrew Welch and Ian Gilman released the game's contents under a Creative Commons license.[80]
MegaBall19912012Breakout cloneApache-2.0Apache-2.0Mackey Software/Ed MackeyThe Amiga game MegaBall was programmed by Mackey Software in 1991–1993. Inspired by Taito's Arkanoid it has several features more. The original author released in 2012 the source code of MegaBall under the Apache License v2.[81] [82]
NoGravity199620053D space space shooter / Wing CommanderGPLv2GPLv2realtech VRSource code released by realtech VR on February 16, 2005.[83]
Nothing to Hide20132013Stealth gameCC0CC0Nicky CaseThe crowdfunded surveillance/privacy-themed video game prototype by indie game developer Nicky Case was crowdfunded and opened under CC0 on GitHub between 2013 and 2015.[84] [85] [86] [87] [88]
PaybackTime 219972014turn-based tactics gamepublic domain softwarepublic domainNiko Nevatie and Kari LuojusThe turn-based tactics game, inspired by Laser Squad and, was developed by two Finish students in Turbo Pascal and x86 assembly. They marketed their game as shareware for DOS in 1997.[89] The authors released the game in August 2014 as public domain software, including the assets.[90]
Pinball Construction Set19832013pinball video game MITMITBill Budge, Electronic ArtsIn 2013, Budge released the source code to the Atari 8-bit and Apple II versions of Pinball Construction Set to the public on GitHub under the MIT license.[91] [92] [93]
Planet Blupi19972017PlatformerGPL-3.0-or-laterGPL-3.0-or-laterEpsitec SA / Daniel Roux, Denis Dumoulin, Mathieu SchroeterPlanet Blupie was freed (source code and all media files) and ported to all major platforms (Linux, macOS and Windows) for its 20th anniversary, released open source under GPLv3 on GitHub in 2017.[94] [95] Speedy Blupi, part of Blupi series, has been released as freeware by EPSITEC too and is available at blupi.org.[96]
Principia20132022Sandbox gameBSD 3-ClauseBSD 3-ClauseBithack ABPrincipia was announced to be made open source in 2016,[97] but the source code was not released until 2022.[98] Development of the game has since then been continued by the community after its source code release.
Spacewar!19622003Space combatPublic-domain softwarePublic domainSteve RussellSource code became available around the 2003.[99]
RuneSword II20012004[100] Turn-based strategyPublic domain software[101] Public domainCrossCut GamesIn 2004 CrossCut Games released the game into the public domain on SourceForge.[102] Since then there is continuous development by the community on the game.[103]
Ryzom20042010MMORPGAGPL-3.0-or-laterCC BY-SA 3.0NevraxIn response to the folding of Nevrax, the Free Ryzom Campaign was launched in order to gather enough funds from donations ("Crowdfunding") from the community to purchase Ryzom and release the game as free software. The campaign was almost successful with €172,988 of the required €200,000 gathered.[104] [105] On May 6, 2010, Winch Gate announced the full release of source code and artwork, and a partnership with the Free Software Foundation.[106] [107]
Seven Kingdoms19962008RTSGPLv2GPLv2 and Proprietary*EnlightSource code released by Enlight in November, 2008. *Music is proprietary[108] [109]
SimCity (Micropolis)1989 (as SimCity)2008 (as Micropolis)City-building gameGPL-3.0-or-later[110] GPL-3.0-or-laterMaxis (Will Wright/Don Hopkins)Source code released by Don Hopkins under GPL in 2008. For trademark reasons released under the original working title Micropolis, also known as OLPC SimCity.[111]
Sissyfight 2000 Returns20142018Multiplayer MITCC BYZimmerman, Clark, and Bhatnagar On April 30, 2013, Zimmerman, Clark, and Bhatnagar announced a crowdfunding campaign on Kickstarter to revive Sissyfight.[112] The campaign was funded on May 30, 2013 with a final total of $22,735.[113] First Beta versions were released 2014. On February 9, 2018, the source code was released under the open-source MIT license and the assets under the CC BY Creative Commons license on GitHub.[114]
Soldat20022020Run and gunMITCC BY 4.0Team SoldatSource code was released under MIT license on GitHub,[115] [116] assets followed shortly after under CC BY 4.0.[117]
Sopwith19842000Shoot 'em upGPLv2GPLv2David L. ClarkThe C and x86 assembly source code to Sopwith was released in 2000,[118] at first under a non-commercial use license, but later under the GNU GPL at the request of fans.[119]
Stunt Coptermid 1986?ArcadePublic domain softwarePublic domainDuane Blehm / HomeTown SoftwareAfter Duane Blehm death in 1988, his parents released Stunt Copter's and his other games' (like ZeroGravity, Cairo Shootout and PUZZ'L) binaries and source code into the public domain.[120]
Super Lemonade Factory20122012/2021Puzzle-platformGPL-3.0-onlyInitialsgamesBased on the Flixel engine developed for the iOS version of Canabalt (that would later become part of HaxeFlixel), and inspired by it to release the source code, with the purpose of enabling source ports.[121] The game was released as freeware on itch.io on February 2, 2021.[122] The entire source code repository (source code and art assets) for the Ouya version was released under the GPL-3.0-only license on GitHub on February 4, 2021 to support the efforts for the preservation of Ouya games.[123]
Supernova19872009Text adventureGPL-2.0-or-laterGPL-2.0-or-laterApogee SoftwareGame source released on March 20, 2009.
Triplane Turmoil19962009side-scrolling dogfighting flying gameGPLv3GPLv3Dodekaedron SoftwareIn 1996 Triplane Turmoil was originally released as shareware DOS game. In 2009 Dodekaedron Software Creations Oy placed Triplane Turmoils source code, documentation, images and sounds under the GPLv3, hosted on SourceForge.[124] [125] The community continued the support and ported the game to other platforms (Linux, Windows) via SDL.
Tyrian (now OpenTyrian)19952007Scrolling shooterGPLv2Freeware/CC BY 3.0 US[126] [127] World Tree Games Productions / Epic MegaGames (Jason Emery, Daniel Cook)The OpenTyrian team ported the closed-source Pascal code of Tyrian to C with permission of Jason Emery in February 2007. The graphic artist Daniel Cook released the artwork shortly after.
VGA Civil War Strategy Game19952017turn based strategyMITMITW. R. HutsellIn 2017 Mr. Hutsell gave the source code of VGA Civil War Strategy Game to Dave Mackey, who ported the game for modern platforms (Windows, Mac, Linux) with the help of SDL and other open-source libraries from QuickBASIC to QB64.[128] The source code is released on GitHub under a MIT license.[129]
Voxelquest20142016open world simulationMITMITGavan WooleryAfter a successful crowdfunding project on Kickstarter to develop an open-world simulation game in 2014,[130] Gavan Woolery developed several iterations of the game's engine. After running out of funding for further development, he open-sourced with support of the backers the game's engine on github.com under MIT license in August 2016.[131] [132]
Wander19742015Text adventurepublic domain (?)public domain (?)Peter LangstonAs of April 2015, the source code (long thought to be lost) of Wander, one of the earliest mainframe text adventures, could be acquired from the original author.[133] [134]
WaterRace20002014Racing gameGPLv2GPLv2 (assets), CC BY-NC-SA 4.0 (music)French Touch, SARLIn January 2014, Pierre-Olivier Latour, co-founder and CEO of French Touch, SARL, have uploaded the game's source code and assets on GitHub under the GPLv2 open-source license[135]
Warfare Incorporated (now Hostile Takeover)20032014RTSFreeBSDBSD licenseSpiffcodeIn July 2014 the game's source code and content got open sourced with a BSD license under the name "Hostile Takeover" on GitHub.[136] [137] As result the game was ported by the game's community to alternative platforms like the Pandora handheld.[138]
Warzone 210019992004/2008RTSGPL-2.0-or-laterGPL-2.0-or-later, CCPumpkin Studios/Eidos Interactive3D real-time strategy game with a unit design system. First source part was released by Pumpkin Studios/Eidos Interactive in 2004 and the rest was released in 2008.[139]
Word Whiz19882009Educational gameGPL-2.0-or-laterGPL-2.0-or-laterApogee SoftwareGame source released on March 20, 2009.
Worms?19832021software toyMITMITDavid S. MaynardThe source code for Worms?, one of the initial Electronic Arts releases, was uploaded to GitHub by Kay Savetz on March 17, 2021 under the MIT license with permission of Maynard.[140]
Zork (also known as Dungeon or Dungeon Adventure)19771978Text adventurePublic domain softwarePublic domainRobert M. Supnik / InfocomPublic domain software ports with source code based on the first "Dungeon" version of Zork, are available in various repositories.[141] [142] Also, Infocom allowed the distribution of the early Fortran version. Original version from MIT.[143] [144]
ZZT19912023Action-adventure puzzleMITno artworkPotomac Computer SystemsOriginally thought to be lost,[145] a source code backup for ZZT 3.0 surfaced and a modified version of it with third-party content removed was uploaded to GitHub by Adrian Siekierka, developer of Reconstruction of ZZT, under the MIT license with permission of Tim Sweeney, creator of the game.[146]

Open-source games with free of charge data

Only the game engines in this table are developed under an open-source license, which means that the reuse and modification of only the code is permitted. The assets are provided free of charge to the final user, but with some restrictions. Note that both the engine and the game code must be available under a license approved by the OSI and/or the FSF, if it was made with a licensed engine.

TitleFirst releaseSource code releaseGenreEngine licenseContent licenseOriginal developerAdditional information
Allegiance (now FreeAllegiance)20002004real-time strategy and Space combat simulatorMIT (earlier Shared Source[147])Microsoft ResearchReleased by Microsoft Research under a shared source license ("MSR-SSLA") 2004.[148] On July 27, 2017, Microsoft Research changed the license from MSR shared source license to MIT license.[149]
Amulets & Armor19972013first person role-playing video gameGPL-3.0-onlyUnited Software ArtistsIn 2013 Amulets & Armor was re-released as freeware on the game's official site and the source code under GPL-3.0-only on GitHub.[150] [151] Work continues for ports to newer systems (Windows, MacOS) and general bug fixes.[152] [153]
Ares (now Antares)19962008Space Strategy video gameLGPLv3[154] CC BY-NC-SA/CC BY-NC-ND/FreewareNathan Lamont/Bigger Planet SoftwareReleased in 2008. Under continued development for modern systems as "Antares" via GitHub.[155]
Avara19962016Shooter gameMITAmbrosia Software / Juri MunkkiThe MacOS classic game became open source in 2016 when Munkki released the source code upon the game's 20th anniversary.[156]
Buzz Aldrin's Race Into Space (now Race Into Space)19932007SimulationGPLv2[157] [158] Strategic Visions/Fritz BronnerA port of Buzz Aldrin's Race Into Space to modern operating systems. The license fell back to Bronner as he had a contract clause with Interplay stating that in case Interplay went bankrupt or no distribution happened for some time.
Cart Life20112014SimulationRichard HofmeierIn March 2014 the game was removed from all digital distributions and the source code and game was made available for free online, with Hofmeier saying he was finished supporting the game.[159] His webpage went later offline[160] but the source code was mirrored on GitHub.[161] [162]
Corncob 3D19932016Flight simulatorPublic domain softwareFreewarePie in the Sky / Kevin StokesThe game became around 2016 freeware and open source.[163]
Dink Smallwood19972003Action RPGZlib inspired own license[164] [165] Robinson TechnologiesSource code published on July 17, 2003, from Seth Robinson.[166] 2008 Artwork published (without some sounds) under a Zlib license.[167] In October 2017 the HD version became fully open source and freeware, too.[168] The source code became available on GitHub shortly after.[169]
Gates of Skeldal19982008Dungeon crawler role-playing video gameGPL-3.0-or-laterNapoleon GamesOn 19 November 2007 the game was made freeware by the Czech developer, in 2008 the source code was released under GPL-3.0-or-later on a SourceForge repository.[170] [171] Later it was translated by fans to English and ported to linux.[172]
Glider 4.019912016Flight simulatorMITJohn CalhounOn January 26, 2016, the source code for Glider 4.0 was uploaded to GitHub.[173]
Glider PRO19942016Flight simulatorGPL-2.0-onlyJohn CalhounOn January 27, 2016, the source code, graphics, and sound data for Glider PRO were released on GitHub with the source code being licensed under the GNU General Public License v2.[174] [175]
Gloom19952017FPSunlicense"for historical purposes"Black MagicIn January 2017 the assembly and BlitzBasic 2 source code of the Amiga Doom clone Gloom was released as public domain software under unlicense on GitHub.[176] The assets were released "for historical and archiving purposes.".[177]
Gunocide II20002001Galaga-like 2D shooterGPLv2Alexander Bierbrauer and Oliver WeilerDeveloped around 2000.[178] After being succesless commercially published via a publisher,[179] the game was released as freeware and under GPL. 2002 ported to Linux and hosted on SourceForge as "G2ex".[180] [181]
H-Craft Championship20072015science fiction racing gamezlib licenseIrrgheistH-Craft Championship was developed by the independent game studio Irrgheist[182] and released by Manifesto Games[183] /Akella in 2007.[184] In 2014, the developers released the game as freeware[185] and the source code under the zlib license in February 2015.[186] [187]
Haunts: The Manse Macabre20122012turn based strategyBSD-3-Clause[188] CC BY-NC-SARick DakanThe 2012 with $29,000 crowdfunded[189] and in Go programmed game was put on GitHub after the money for further development run out.[190] [191] While a volunteer keeps updating the almost finished prototype,[192] the against the Go 1.0 API build game fails to compile with newer compilers and Go versions.
Hypercycles19952017ShooterGPL-3.0-onlyBob HaysReleased in January 2017 on GitHub.[193] [194] As August 16, 2020, the repository was removed from GitHub. The code has been re-uploaded on GitHub
Infinity20022016RPGGPL-3.0-or-laterCC BY-NC-ND 4.0 / CC BY-NC-SA 4.0Affinix SoftwareDeveloped in 2002 as commercial Game Boy Color title (~90% finished) the game was never published. Infinity was released as non-commercial freeware with source code in August 2016,[195] [196] [197] and after a successful Kickstarter campaign in August 2021, development was restarted by Incube8 Games.[198] [199]
Iron Seed19942013Space trading and combat simulatorGPLv3Channel 7Released as freeware by the authors to promote the development of Iron Seed 2 in the 2000s. Source opened under the GPL by the developers in 2013.[200]
Magic Land Island (now Pocket Island)20112012Casual gameMITCC BY-NC-SAWoogaMagic Land Island was launched during the GDC Europe in August 2011. In June 2012 the HTML5 game was open sourced under the name Pocket Island on GitHub under MIT license and with the assets under Creative Commons license CC BY-NC-SA.[201] [202]
(now Aleph One)19952000FPSGPLv2BungieReleased by Bungie on January 17, 2000.[203]
Marathon Infinity (now Aleph One)19962011FPSGPL-3.0-or-laterCC BY-NC-SA 3.0BungieReleased by Bungie in 2011.[204]
Meridian 5919952012MMORPGGPL-2.0-only (excluding compression and audio libraries)Archetype InteractiveAs of February 2010 Meridian 59 has been turned over to the original technical developers, Andrew and Chris Kirmse. On September 15, 2012, they released the game to the public as Freeware and most of the source code under the GPLv2 license.[205]
The Pit Puzzle19972011Puzzle gameApache-2.0Freeware[206] Abe Pralle / PlasmaworksThe DOS game source code was released around 2011 by the author Abe Pralle under Apache 2.0 License on GitHub.[207]
Postal19972016GPL-2.0-onlyRunning with ScissorsIn 2015 the Running with Scissors developers announced that they will release the source code of the game "if someone promises to port it to the Dreamcast."[208] In June 2016 the developers gave the source code to a community developer who ported the game to Linux for the OpenPandora handheld.[209] [210] On December 28, 2016, the source code was released on Bitbucket under the GPLv2.[211] [212]
Project Starfighter20012008Shoot 'em upGPLv2[213] [214] Parallel Realities
Star Control II (now The Ur-Quan Masters)19922002Action RPGGPLv2CC BY-NC-SA 2.5Toys for Bob (Fred Ford / Paul Reiche III)Source code of the 3DO version GPL-released in 2002.[215]
Star Ruler 22015[216] 2018Real-time strategy, 4XMITCC BY-NC 2.0Blind Mind StudiosReleased on GitHub as an open-source project, including assets under the CC BY-NC (but not music) on July 22, 2018.[217] [218]
20042011Space combat simulatorNew BSD LicenseDestroyer Studios / Matrix GamesSource code released by Destroyer Studios/Matrix Games on December 14, 2011.[219] [220]
Strange Adventures in Infinite Space20022005/2009Space RoguelikeGPL-3.0-or-laterCC BY-NC 4.0Digital EelSource was released under GPL by Digital Eel in 2005.[221] [222] Content became freeware 2009.[223] License changed to GPLv3 and assets to CC BY-NC-4.0 on May 18, 2020.[224]
Team 47: GoMan1997[225] [226] 1998Mech gamePublic-domain software47-TEKReleased artwork and source code to public in May 1998.[227] [228] As of March 2022, source code has been uploaded to GitHub.
Tread Marks20002017Tank Combat/RacingGPL-3.0-or-laterLongbow Digital Arts / Seumas McNallyWon in 2000 the Seumas McNally Grand Prize. On January 20, 2017 the source code was released as open source on github.com and the game itself as freeware.[229] [230] A port to Linux and MacOS is in progress.[231] In September 2017 a version for the Linux-based OpenPandora was released.[232]
Tribal Trouble20052014RTSGPLv2OddlabsIn September 2014 the game's source code was released to the public on GitHub and is now open source under the GPLv2.[233] Development continues in a community fork.[234]
Tribes 220012012FPSDynamixMany commercial titles were developed using the Torque engine.[235] GarageGames released Torque 3D under the MIT License on September 20, 2012.[236] The Tribes 2 source code beside the Torque engine is not available.[237]

Open-source games

Only the game engines in this table are developed under an open-source license, which means that the reuse and modification of only the code is permitted. The assets are not provided for free and must be bought by the final user. Note that both the engine and the game code must be available under a license approved by the OSI and/or the FSF, if it was made with a licensed engine.

TitleFirst releaseSource code releaseGenreEngine licenseOriginal developerAdditional information
20102022Action-adventure game / Hack and slashGPL-3.0-or-later1C: Seawolf StudioSource code of game engine was released on GitHub under GPLv3 on November 28, 2022.[238]
20092021Role-playing gameGPL-3.0-or-laterAkellaSource code of Storm Engine released on GitHub under GPLv3 in a 2021 and support Sea Dogs: To Each His Own and .[239] [240]
20132020Survival horrorGPL-3.0-or-laterThe Chinese RoomOn September 23, 2020, Frictional Games released the source code for this game.[241] Source code was released on GitHub under the GPLv3.[242]
20102020Survival horrorGPL-3.0-or-laterFrictional GamesOn September 23, 2020, Frictional Games released the source code for this game on its 10th release anniversary. Source code was released on GitHub under the GPLv3.[243]
20122013Visual novelLove Conquers All GamesDeveloped using the Ren'Py engine, the game code for Analogue: A Hate Story was released on May 4, 2013 under a public-domain-equivalent license. The source code release includes the entire script of the game for context, but the script remains proprietary.[244]
Arx Fatalis (now Arx Libertatis)20022011RPGGPL-3.0-or-laterArkane StudiosThe design of Arx Fatalis was heavily influenced by Ultima Underworld. Game source released by Arkane Studios on January 14, 2011.[245] Based upon this source code the formed Arx Libertatis-project created Fan-made patches and Source ports.[246] [247]
Aquaria20072010Action-adventureGPL-2.0-or-laterBit BlotOpen sourced with Humble Indie Bundle.[248]
19942013FPSGPL-2.0-or-later[249] Apogee SoftwareReleased in 2013 to promote the sale of the Apogee Throwback Pack on Steam.[250] [251]
Canabalt20092010Cinematic platformerAdam SaltsmanReleased by Adam Saltsman in 2010.[252]
Catacomb19892014Top-down shooterGPL-2.0-or-laterFlat Rock SoftwareReleased by Flat Rock Software on June 5, 2014 on GitHub.[253]
Catacomb 3D19912014FPSGPL-2.0-or-laterFlat Rock Software / id SoftwareReleased by Flat Rock Software on June 5, 2014 on GitHub.
The Colony19882023FPSApache-2.0Dave SmithSource code for the PC, Mac and Amiga versions released by Smith on GitHub on June 6, 2023, with the source code under the Apache License 2.0.[254]
Command & Conquer, 19952020RTSGPL-3.0-or-laterWestwood StudiosThe games' code was released along with the Command & Conquer Remastered Collection in order to aid in the development of mods. It can be used to build mods for the remaster, but due to some missing bits that are substituted by the remaster's own (closed source) engine, it can not be used to directly re-build the original (unremastered) games from them.[255] However down stream projects such as Vanilla-Conquer have allowed source ports of the unremastered games to be developed by developing replacements for the missing code.[256]
Commander Keen in Keen Dreams19912014PlatformerGPL-2.0-or-laterid SoftwareIn September 2014, after an Indiegogo crowdfunding campaign,[257] the game's source code was released on GitHub.[258] [259]
CoreBreach20112012Racing gameMIT/GPL-2.0-only [260] CoreCodeFuturistic "anti-gravity" racing game with combat. Source was released after a sales quota was met.
Cortex Command20122019Action gameAGPL-3.0-onlyData Realms LLCThe indie game was in development since 2001, which won an IGF award in 2009,[261] was finally released in 2012.[262] In July 2019 the source code was released under AGPL-3.0-only on GitHub.[263] [264] As of end of 2019 the work on a community continuation, dubbed "Cortex-Command-Community-Project", is ongoing.[265]
Delver20122018First-person action roguelike dungeon crawlPriority InterruptDeveloped using the libGDX framework; on November 15, 2018, Chad Cuddigan released the source code under the GPLv2.[266] Changed to a modified version of the zlib license on November 23, 2018,[267] and changed to the regular zlib license on September 21, 2020.[268]
Descent 319992024FPSGPL-3.0-or-laterOutrage EntertainmentOn April 16, 2024, Kevin Bentley (one of the programmers of the game) released the source code for Descent 3 on GitHub,[269] under authorization of Matt Toschlog,[270] co-owner of the copyright holder of the game.[271]
Doom (3DO)19952014FPSMITLogicwareOn November 30, 2014, the source code of the 3DO Interactive Multiplayer port of the game was released by Rebecca Heineman (sole developer of the port) under an MIT license, a different license than the Doom version for Linux, and the Atari Jaguar port.[272] [273] [274] [275]
Doom and (Linux)1993/19941997/1999FPSGPL-2.0-or-laterId SoftwareGame source released on December 23, 1997, placed under GPL-2.0-or-later on October 3, 1999.
Doom (SNES)19952020FPSGPL-3.0-or-laterSculptured SoftwareOn July 14, 2020, Randy Linden uploaded the source code for his Super Nintendo Entertainment System conversion of Doom to GitHub.[276]
Doom 320042011FPSGPL-3.0-or-laterId SoftwareGame source released on November 22, 2011.[277]
20122012FPSGPL-3.0-or-laterId SoftwareSource code released on November 26, 2012 on GitHub.[278]
DROD series19972000Puzzle gameMPLv1.1[279] Webfoot / Erik HermansenAfter the author reacquired the rights to the game from the original publisher Webfoot,[280] he released the source code of the game engines.[281] The source code releases include DROD: King Dugan's Dungeon, DROD: Journey to Rooted Hold, DROD: The City Beneath, DROD: Gunthro and the Epic Blunder, DROD: The Second Sky, and DROD RPG: Tendry's Tale without its media assets.[282]
Eldritch20132014FPS, roguelikezlib LicenseMinor Key GamesIn April 2014, the game's source code was released to the public under a permissive zlib license. Content still proprietary and game being sold.[283] [284]
Flotilla201020203d tactic gameBlendo GamesIndie game developer Blendo games released the source code to Flotilla on its 10th release anniversary.[285] [286] The source code is Zlib licensed on GitHub, but assets are not included.[287]
Gish20042010ActionGPL-2.0-or-laterCryptic SeaSource opened with Humble Indie Bundle by Wolfire Games.[288] [289]
Glypha III1990s2016ArcadeMITJohn CalhounOn January 27, 2016, the source code, graphics, and sound data for Glypha III were released on GitHub with the source code being licensed under the MIT License.[290] Updated ports for MacOs and iPhone were created afterward.[291] [292] [293] A cross-platform OpenGL based port was released around May 2018 on GitHub.[294]
Good Robot20162020Multidirectional shooterMITPyrodactyl GamesOn August 3, 2020, Arvind Raja Yadav from Pyrodactyl Games released the source code for three of their games (Unrest, Will Fight for Food and Good Robot) under the MIT License on GitHub.[295]
Hammerfight200920112D physic based combat gamezlib license[296] Konstantin Koshutin For the third Humble Indie Bundle[297] [298] Ryan C. Gordon ported the underlying game engine, "Haaf's Game Engine", to Linux and Mac OS X, and released source code under the zlib license.[299] [300] Relish Games released the original version of HGE 1.8.1 for Windows/DirectX to GitHub under zlib license, too.[301]
Heretic19941999FPSGPL-2.0-onlyRaven SoftwareGame source released on January 11, 1999 under a very restrictive license,[302] [303] relicensed to GPL on September 4, 2008.[304] [305] [306] The ACC script compiler was not included in the GPL re-release.
19951999FPSGPL-2.0-onlyRaven SoftwareGame source released on January 11, 1999 under a very restrictive license, relicensed to GPL on September 4, 2008. The ACC script compiler was not included in the GPL re-release.
Hexen II19972000FPSGPL-2.0-onlyRaven SoftwareGame source released on November 10, 2000.[307]
Hovertank 3D19912014FPSGPL-2.0-or-laterFlat Rock Software/id SoftwareReleased by Flat Rock Software on June 5, 2014 on GitHub.
Lemma20142014Voxel FPS open world parcour[308] MITEvan ToddDespite an unsuccessful crowdfunding campaign in 2014,[309] Lemma was released commercially by the developer DRM-free and also on Steam. The source code is openly developed and available on GitHub under a MIT license.[310] [311]
Little Big Adventure and Little Big Adventure 21994/19972021Action-adventureGPL-2.0-onlyAdeline Software InternationalSource code released on GitHub under the GPL-2.0-only license by 2.21, the current copyright holders.[312]
Machines: Wired for War19992020Real-time strategyGPL-3.0-or-laterCharybdis/Nightdive StudiosThe game was released by the new rights holder Nightdive Studios in 2020.[313] The source code is under GPLv3 on GitHub.[314] The assets are available too from the original developer's webpage.[315]
Monster RPG 220102012JRPGzlib LicenseNooskewlAfter a successful Indiegogo campaign, released by Nooskewl under a Public domain like license ("Give it Your Own License") on November 11, 2012.[316] [317] Later changed to zlib license, and the content sold again to be able to pay the server bills.[318]
20072010MMORPGGPLv3Cyan Worlds"Myst Online: Uru Live" struggled to attract subscribers and was canceled after its first year. Cyan release the game as an open source game in 2010.[319]
Natural Selection20022014FPSGPLv2 (most code) / custom (external libraries)[320] Unknown Worlds EntertainmentIn January 2014 Unknown Worlds released the source code for download on GitHub.[321]
20002010FPSGPLMonolith ProductionsIn 2001, Monolith Productions released a set of editing tools for No One Lives Forever that included the level editor and model editor used for development.[322] The team also released the source code for NOLF (version 1.003 on Windows) that year to "support the fan base by offering the tools to create their own levels".[323] [324] It is available both as a download, as well as on the Game of the Year Edition CD-ROM. Years later around 2013 Lithtech source code became available on GitHub under GPL,[325] and work for merging game code and engine started.[326]
20022011FPSGPLv2[327] Monolith ProductionsSource code released by Monolith Productions/Sierra Entertainment as part of a modding toolkit.[328]
Overgrowth20172022ActionApache-2.0Wolfire GamesOn April 21, 2022, Wolfire Games released the source code to Overgrowth on GitHub under the Apache License 2.0.[329]
Pararena 219922016Action sport gameMITJohn Calhoun On January 27, 2016, the source code was released on GitHub licensed under the MIT license.[330] [331]
20072009Survival horror with FPS aspectsGPL-3.0-or-laterFrictional GamesDeveloped by Swedish[332] developer Frictional Games, the game blends the genres of survival horror, first-person shooter, and adventure. Open sourced with Humble Indie Bundle.[333]
Quake19961999FPSGPL-2.0-or-laterId SoftwareGame source released on December 21, 1999.
Quake II19972001FPSGPL-2.0-or-laterId SoftwareGame source released on December 22, 2001.
Quake III Arena19992005FPSGPL-2.0-or-laterId SoftwareGame source released on August 19, 2005.
Quake 420052021FPSGPL-2.0-or-laterRaven SoftwareAdapted to the GPL id Tech 4 source code from Doom 3 with some issues remaining.[334]
19942023Scrolling shooterGPL-2.0-or-laterCygnus StudiosReleased on October 1, 2023 on GitHub.[335]
20002022ShooterMITArgonaut GamesSource code uploaded on GitHub on September 26, 2022 under the MIT license by Matt Godbolt (one of the three programmers of the game) under authorization of Jez San, founder of Argonaut Games.[336]
Return to Castle Wolfenstein20012010FPSGPL-3.0-or-laterGray Matter Studios/Nerve SoftwareThe source code for Return to Castle Wolfenstein and Enemy Territory was released under the GNU General Public License (GPL) on August 12, 2010.[337] [338]
Revenge of the Titans20102011Tower Defense, RTSBSD-3-ClausePuppy GamesJava based game. Source code was released by Puppy Games with the success of the second Humble Indie Bundle.[339]
Rise of the Triad19942002FPSGPL-2.0-or-laterApogee Software/3D RealmsGame source released on December 20, 2002.[340]
Serious Sam (Serious Engine)20012016FPSGPL-2.0-onlyCroteamIn March 2016, Croteam released Serious Engine v1.10 as free and open-source software on GitHub under the GNU General Public License.[341] [342]
Seven Kingdoms II19992009RTSGPLv2EnlightSource code released in August, 2009.
19981998FPSGPLMonolith ProductionsIn 1998, SDK released the game logic for modders.[343] The Lithtech engine was not included as source code. Around 2013, Lithtech's source code became available on GitHub under the GPL, and the work of merging the game logic and the engine started. As of the end of 2019, this reworked NOLF2/LithTech engine reached a buildable state under Windows, and the work continues.[344]
Siege of Avalon20002003RPGLGPLDigital TomeSource code released June 23, 2003.[345] Later one of the original developers announced the preparation of a re-release of SOA, but nothing came out of it.[346]

In September 2017 a community developer managed to fix the dependencies of the Open source release, recompile the executable, fixing several bugs and introducing higher resolution support for the game.[347]

Soul Ride2000[348] 2003Snow board simulation/sport gameGPLv2[349] Slingshot Game TechnologyOn 20 Jan 2003 Soul Ride's game engine source code was released to allow ports to alternative OSes.[350]
Spacebase DF-920132015Space simulatorCPALDouble FineAfter Double Fine ended the support of the controversy ridden and incomplete game on end of 2014,[351] fans have been working to continue the game's development with the availability of the source code in May 2015 under the CPAL open-source license.[352] First patch became available in October 2015.[353]
Spear of Destiny19921995FPSGPL-2.0-or-later[354] id SoftwareThe source code of Wolfenstein 3D, which also covered Spear of Destiny, was released on July 21, 1995.
Spectromancer20082020Turn-based strategyThree Donkeys LLC/Apus SoftwareOn March 4, 2020, Ivan Polyacov from Apus Software released the source code to the Apus Game Engine, the in-house game engine by Apus Software used for Spectromancer and Astral Heroes after reaching the $50 tier on his Patreon.[355] The game code to Astral Towers was also released to patrons.[356] [357]
Speed Haste19952012racing video gamepublic domain like licenseJavier Arevalo BaezaIn 2012 the game's developer Javier Arevalo Baeza released the Borland C source code (minus some commercial library part) for "you can do whatever you want with this code" on GitHub.[358]
20022013First/Third-person shooterGPL-2.0-onlyRaven SoftwareRelease of the source code by Raven Software and Activision coincided with the closing of LucasArts by Disney.[359]
20032013First/Third-person shooterGPL-2.0-onlyRaven SoftwareRelease of the source code by Raven Software and Activision coincided with the closing of LucasArts by Disney.
System Shock19942018FPSGPL-3.0-or-laterNight Dive StudiosIn April 2018 the Mac version's source code was released by Night Dive on GitHub,[360] fulfilling a 2016 promise.[361] [362] [363] After one month of development, a cross-platform source port, called "Shockolate", for modern compilers and platforms was released by community developer Chad Cuddigan.[364]
To Heart 220042006Visual novelGPLv2AquaplusIts source code was released by Aquaplus under the GNU General Public License on December 22, 2005, along with the source code for Arurū to Asobo!, Tears to Tiara, and Kusari.[365] [366] This decision was made due to the inclusion of Xvid derived code; Xvid being distributed under the same license. The source code for all four games is distributed upon request in CD-R format. A copy of the original source code is hosted on GitHub,[367] as also an continued engine project.[368]
To the Moon20112014role-playing gameGPL-2.0-or-laterFreebird GamesTo the Moon was developed using RPG Maker XP engine in 2011. In January 2014 To the Moon was also released for OS X and Linux with the Humble Bundle X. Edward Rudd ported the game with the GPLv2 RPG Maker XP game engine recreation MKXP,[369] [370] other ports followed later.[371] Also a successor game by Freebird games, "A Bird Story", was ported to Linux under usage of MKXP.[372]
Toki Tori 2+20132021puzzle platform gameGPL-2.0-onlyTwo TribesOn December 17, 2021, Two Tribes released the source code to their in-house engine used for games like Toki Tori 2+ and Rive under the GPL-2.0-only license on GitHub.[373]
Unrest20142020Role-playing video gameMITPyrodactyl GamesOn August 3, 2020, Arvind Raja Yadav from Pyrodactyl Games released the source code for three of their games (Unrest, Will Fight for Food and Good Robot) under the MIT License on GitHub.
Urban Chaos19992017Action-adventure gameMITMucky FootIn May 2017 Mucky Foot's Mike Diskett released the source code of Urban Chaos under the MIT license on GitHub.[374]
Vangers19982016racing and role-playing genreGPLv3K-D LabIn March 2016, Vangers source code was released[375] under GPLv3 license. Data was not freed though, so one still needs data files from Steam or GOG.com released in order to run the game.
Wolfenstein 3D19921995FPSGPL-2.0-or-laterid SoftwareThe source code of Wolfenstein 3D, which also covered Spear of Destiny, was released on July 21, 1995.
20032010FPSGPL-3.0-or-laterSplash Damage/id SoftwareGame source released on August 12, 2010.[376]
World in Conflict (server code)20072017Real time strategy gameGPL-2.0-or-later[377] UbisoftGame source released in 2017 by ubisoft after support ended in 2014.[378]

Source-available games with free of charge data

Video games in this table are source-available, but are neither open-source software according to the OSI definition nor free software according to the Free Software Foundation. If the source code is given out without specified license or public domain waiver it has legally to be considered as still proprietary due to the Berne Convention. The assets are provided free of charge to the final user, but with some restrictions.

TitleFirst releaseSource code releaseGenreEngine licenseContent licenseOriginal developerAdditional information
Agony19922020Shoot 'em upnon-commercial useFreewareArt & MagicAround 2010, graphic artist Franck Sauer started to offer the game's binary files (ADF format) for free download on his personal webpage, making the game Freeware.[379] On July 4, 2020, Yves Grolet (programmer of the game) uploaded all his Amiga development files (which included full source code for Agony) to WeTransfer.[380]
198720044x gameno license givenGeorge MoromisatoDeveloped by George Moromisato in 1987. Around 2004 the source code of the DOS version 2.00 was released.[381]
Beneath a Steel Sky19942003Point and click adventureBeneath a Steel Sky Freeware LicenseBeneath a Steel Sky Freeware LicenseRevolution SoftwareThe assembly language source code of the game was made available to the public and ScummVM in August 2003.[382] [383] The source code availability made it possible for the ScummVM project to support the game, which allows the game to be played on Windows, OS X, Linux, Windows CE and other compatible operating systems and platforms.
Beyond Castle Wolfenstein19852005Stealth gameno license givenSilas WarnerThe reconstructed source code and the ported game was released by Silas Warner's widow in 2005.[384]
Beyond Protocol (now After Protocol)20082011persistent, space MMORTSnon-commercial public licenseFreewareDark Sky EntertainmentInitial design of Beyond Protocol began in 1991.[385] A scaled up beta program began Nov 15th 2007[386] with an open-beta in 2008. When due to financial issues the game has been shut down, the source code was released on 4 May 2011 on SourceForge to the public.[387] Based on this source code, community organized development continues until today as After Protocol.[388]
Bob's Game20042016puzzle, action RPGRobert PelloniIn August 2016 the source code of the game was released on GitHub under a non-commercial source available software license,[389] to allow the community to contribute. The author claims that he wrote the game originally in C, switched then to Java, and later converted it with an automatic code converter to C++.[390]
Carnivores 219992013SimulationAction FormsA version from 2013 is available on assembla.[391] Around 2017 the source code was released via Moddb.[392]
Crystal Mines19892011ArcadeCustom permissive licenseKen Beckett / Color DreamsIn August 2011 Ken Beckett, the programmer of the NES game Crystal Mines, released the source code under a custom permissive license to the public.[393] [394] Artwork still proprietary but can be shared for non-commercial, personal use.[395]
Digger19832004ArcadeWindmill SoftwareThe original source code became available in September 2004 "for historical interest" (together with source code of other Windmill Software games as Styx).[396] [397] There is also an earlier free software reverse engineered variant available by Andrew Jenner, called Digger Remastered, ported for many platforms.[398]
Dungeons of Daggorath198220013D Dungeon crawlerDynaMicro / Douglas J. MorganAfter years of no further distribution from the publisher Radio Shack of the game, the distribution rights fell back to the developers. Morgan released game around 2001 under a freeware like license to the public, also offering the source code.[399] [400] Following, the game's community has created ports for PC,[401] Linux,[402] RISC OS[403] and PSP.[404]
Enemy Nations19972005[405]
/2006[406] [407]
RTSown non-commercial license[408] non-commercial FreewareWindward StudiosGame source and artwork was released by Windward Studios under a non-commercial license around 2005/2006.
Fort Apocalypse19822015actionCC BY-NC-ND 2.5CC BY-NC-ND 2.5Steve Hales / Synapse SoftwareIn 2007 the Atari 8-bit game was relicensed to a CC BY-NC-ND 2.5 by Steve Hales and released on IgorLabs.[409] On April 23, 2015, Steve Hales released the assembler source code to Fort Apocalypse on GitHub, also under CC BY-NC-ND 2.5, for historical reasons.[410]
Free Fall19831999Beat 'em up?Ian Bell / AcornsoftIn 1999, developer Ian Bell released the video game's BBC Micro assembly source code on his website.[411] Semi-serious he considers it the first ever Beat 'em up video game.
Flow20062009Life simulation? (For educational purposes)FreewareThatgamecompany / Jenova ChenAround 2009 the flash source code was made available for educational purposes by the developers.[412] [413]
HoverRace19962008Racingoriginally time limited license / later non-commercial GrokkSoft HoverRace SourceCode License.[414] [415] FreewareGrokkSoftWas first published under a time-limited license. In 2008 re-newed with an infinite duration license.[416]
In Pursuit of Greed19962014FPSnon-commercial use, "for educational and personal use only"Freeware (non-commercial)Mind Shear SoftwareBased on Softdisk Publishing's "Raven engine" which powered also ShadowCaster. The game was released (including the engine) later by the developer as non-commercial freeware in 2014.[417] [418] [419]
Kiloblaster19922008ArcadeOwn license[420] (with additional restriction)Epic MegaGamesAllen Pilgrim declared the registered version freeware and released also the source code on August 4, 2008.[421] [422]
Kumquat & Cantaloupe19962012MazeundefinedFreewareDave SchofieldThe Amiga games Kumquat & Cantaloupe, originally released as shareware titles, were re-released as freeware with source code included by the author in November 2012.[423] [424]
Magus19952014Rogue-likeRonny WesterAround 2014 archived on GitHub from other now offline sources.[425] A SDL port is in progress.[426] In 2000 Wester released also the Borland Pascal 7 source code of Cyberdogs (excluding some libraries he had licensed) on his website.[427]
Roboforge20012008Multiplayer Strategy game"RoboForge, Personal, Non-Commercial Use End User License"FreewareLiquid EdgeAnnounced the game in July, 2000[428] by Liquid Edge the game was released on May 23, 2001.[429] From July 2008 RoboForge became an open-source project with the source code for the Java-based client and server under a non-commercial license and as freeware.[430] The game's community continues development.
Rocky Racers2002[431] 2004[432] Racing gameNon-Commercial licenseFreewarePositech GamesReleased around 2002 by Positech Games, the game's C++ source code was released in July 2004 to the public for free.
20032007online Real-time strategy, FPSno license/proprietary[433] S2 GamesThe game was turned freeware by S2 Games on September 1, 2006. In 2007 the source code became available to the game community,[434] who now continues development.[435] The game can be played on Windows, Mac OS X and Linux.
Sea Dragon19822015Scrolling shooter?Public-domain softwareAdventure InternationalIn 1995, Wayne Westmoreland (co-designer of the game) placed the original TRS-80 binaries for Sea Dragon in the public domain.[436] On December 19, 2015, Kevin Savetz uploaded the source code for the Atari 8-bit version of Sea Dragon under no license to the Internet Archive with permission of Russ Wetmore, developer of the port.[437]
Stellar Conquest III: Hostile Takeover1994[438] 2006Stellar Conquest inspired Space simulationopen source freeware (non-commercial)Freeware (non-commercial redistribution allowed)NecroBones / Ed T. Toton IIIThe Turbo Pascal 6 source code for the VGA DOS game was released in February 2006 together with the game itself as freeware by the developer.[439]
Stellar Frontier19972008Space simulationSTARDOCK SHARED SOURCE STELLAR FRONTIER LICENSE (non-commercial license)[440] STARDOCK SHARED SOURCE STELLAR FRONTIER LICENSE (non-commercial license)StardockStellar Frontier was developed by Doug Hendrix in 1995 and was later licensed and published by Stardock. On August 4, 2006, Stardock Systems closed the official master server. On November 18, 2008, the game source code was released under an own non-commercial license.[441] As result, the game's community took over the support of the game and improved the game, fixed the bugs and security holes with self-made patches.[442]
Treasures of a Slaver's Kingdom20072010Z-machine Text adventure gameFreewareFreewareCumberland Games & DiversionsS. John Ross released the commercial Treasures of a Slaver's Kingdom, which won the XYZZY Award 2007 for the best NPC, in 2010 with Z-machine source code as freeware.[443] More source code of text adventure from the 1970s and 1980s are available at the archive.[444]
World Train Royale20092011Tycoon game?FreewareVersus SoftwareSold around 2009 for 10 dollars,[445] the game source code was released on 26 June 2011 on SourceForge.[446] [447]
Xargon19932008Platformerown license (with additional restrictions)Epic MegaGamesGame source released in 2008 by the programmer Allen Pilgrim.[448] A SDL port followed later by Malvineous.[449]

Source-available games

Video games in this table are source-available, but are neither open-source software according to the OSI definition nor free software according to the Free Software Foundation. If the source code is given out without specified license or public domain waiver it has legally to be considered as still proprietary due to the Berne Convention. The assets are not provided for free.

TitleFirst releaseSource code releaseGenreEngine licenseContent licenseOriginal developerAdditional information
3-D Ultra Pinball: Thrill Ride20002020PinballLeft Field ProductionsOn May 13, 2020, Dave Ashley added the source code of the Game Boy Color port to his Game Boy Color development repository.[450]
Airline Tycoon19982015Simulation game[451] CommercialSpellbound EntertainmentOn 24 March 2015 Airline Tycoon Deluxe was re-released on the digital distribution platform gog.com, including the source code.[452]
Alien 319922019Run and gunProbe SoftwareOn May 19, 2019, Michael J. Archer uploaded the source code for the Commodore 64 version of the game to GitHub.[453]
19961997FPS?Team17In March 1997 Team17 made the source code of Alien Breed 3D and Alien Breed 3D II freely available on the cover CD of Amiga Format magazine issue 95.[454] [455] [456]
Alien vs Predator (Atari Jaguar game)19942008FPS?Rebellion DevelopmentsReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008.[457] [458] Source code was provided by Atari historian Curt Vendel.[459]
Aliens versus Predator20002001FPSOwn non-commercial license[460] Rebellion DevelopmentsSource code released by Rebellion Developments 2001. An unofficial patch project for the PC version, based on the source code, was released and is still updated.[461]
Alpha Waves19902009early 3D exploration game with platform aspects??Christophe de DinechinReleased in 1990 as one of the earliest 3D games[462] with full 6-axis degree of freedom. In 2009, author Christophe de Dinechin released the complete assembly and GFA BASIC source code of the Atari ST version.[463] [464] There is also a started PC port in C++ on SourceForge by the original author.[465] [466]
Altered Beast19892019Beat 'em upSoftware StudiosOn May 19, 2019, Michael J. Archer uploaded the source code for the Commodore 64 conversion of the game to GitHub.
Anachronox20012001 (partly)RPGIon StormSome bits of code distributed with the official editor.
Anodyne20132020Action-adventureAnodyne LicenseAnodyne LicenseAnalgesic ProductionsOn April 4, 2020, Melos Han-Tani from Analgesic Productions released the source code of Anodyne under a custom permissive license.[467] [468]
Army Men III20132018Third-person shooterNon-commercial useFreewareNeotl EmpireArmy Men III was released in early access in 2013 and under development until its cancellation in 2016. Two years later, the unfinished game was released as open source on SourceForge in April 2018.[469]
Atomic Robo-Kid19902019Scrolling shooterActivisionOn May 19, 2019, Michael J. Archer uploaded the source code for the Commodore 64 conversion of the game to GitHub.
Attack of the Mutant Camels19892012Scrolling shooters??Jeff MinterIn 2012 the assembly language source code of the Konix version of the game was released on GitHub.[470] [471]
Aztaka20092011Action role-playing gameCitérémisIn 2011 Independent game developer Citérémis released a "Developer's Edition" of Aztaka for $9.99 which included also the source code of the game.[472] [473]
Balance of Power19852013Government simulation game??Chris CrawfordIn August 2013 Chris Crawford released source code of several of his games from his career to the public,[474] fulfilling a GDC 2011 given promise.[475] Beside Balance of Power he released all the source code he could recover, for instance , Excalibur, Gossip, Eastern Front (1941), Scram and Legionnaire.
Batman Returns19932015sidescrolling Beat 'em upfor educational purposesfor educational purposesACME / Chris ShrigleyIn March 2015 programmer Chris Shrigley, who worked on the Sega CD version, found the Batman Returns source code and released it for educational purposes to the public.[476] He released also the source code of Magician, Cliffhanger, Gargoyles and some other games from his working career.[477]
19992020BoardLeft Field ProductionsOn May 13, 2020, Dave Ashley added the source code of the game to his Game Boy Color development repository.[478]
19981999FPSMonolith ProductionsIn 1999, SDK released the game logic for modders.[479] The LithTech engine was not included as source code.
Blue Max19832016Scrolling shooterBob PollinAssembly source code released in 2016 by the author Bob Pollin in the Atariage forum.[480] On the Atariage forum source code of many more games was released.[481] [482] [483]
Breakout 200019962008ActionMP GamesReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
and II: The Smoking Mirror1996/19972003Point and click adventureRevolution SoftwareThe source code of the games was made available to ScummVM in 2003.[484]
Call to Power II20002003turn-based strategy gameNon-commercial own license[485] ActivisionCivilization clone. Source opened to the apolyton community to allow support with Community patches.[486]
Checkered Flag19942008RacingRebellion DevelopmentsReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
Civilization IV20052006 (partly)turn-based strategyFiraxis Games / 2K GamesIn April 2006 the developers released the source code of the core game mechanic to the public with a Software Development Kit.[487] [488] Additionally to the released source code, as game data and rules are stored in XML files and most of the game is written in Python, much (but not all) of the game is "open" and easily customizable.[489] The game's community produced later many mods, total conversions and optimization patches for the game.[490]
Civilization V20102012 (partly)turn-based strategyFiraxis Games / 2K GamesIn Fall 2012 the developers released the source code of the core game DLL.[491] The game's community produced later a community patch project.[492] [493]
Club Drive19942008RacingAtari CorporationReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
Contract J.A.C.K.20032003FPSMonolith ProductionsGame code distributed with the official editor (www.mpgh.net).
20012013Space Real-time strategyFever Pitch StudiosOn December 9, 2013, the source code was bundled with every copy of the game purchased on GOG.com.[494] [495]
Cook, Serve, Delicious!20122016Business simulation gameVertigo GamingSource code released in the Humble GameMaker Bundle on September 6, 2016.[496] [497] [498]
Crazee Rider19872019RacingSuperior SoftwareIn November 2018 the source code of Crazee Rider in BBC Micro 6502 assembly language was released by Kevin Edwards, designer of the game.[499] In April of the following year the source code for the Acorn Electron version was also released.[500]
CryEngine 52002[501] 2016FPS?NACrytekIn 2016 Crytek released their engine as pay-what-you-want including the source code to the public.[502] [503]
Crysis2007?FPSCrytekGame code was officially released with the SDK.
Crysis 22011?FPSCrytekGame code was officially released with the SDK.
Cybermorph19932008ShooterAttention to DetailReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
Daikatana20002015FPS?Ion Storm / John RomeroLacking any further official support after the closure of Ion Storm's Dallas office in 2001, John Romero gave the game's source code to community members, allowing them to develop additional platform ports and bug fixes.[504] [505]
DarkSpace20012009MMO, Real-time strategymultiple, self-written licenses.[506] PalestarDarkSpace's game engine called Medusa released by Palestar under multiple licenses.[507]
Death and Taxes20202020Simulation gamePlaceholder GameworksAfter selling well the indie game's Unity source code was released on GitHub[508] to help other developers.[509] [510]
Death Ray Manta20122015Arena shootereducational purposesBagfull of Wrong / Rob FearonThe GameMaker Studio based game's source code was released in 2015 with a Humble Indie Bundle.[511] The assets followed in 2016.[512]
Descent, Descent II1995/19961997/1999space 3D FPSown license[513] Parallax SoftwareGame source released by Parallax Software in 1997 (Descent 1)[514] and 1999 (Descent 2).[515] Descent 3 source code seems to be in hands of Rebecca Heineman and were considered 2014 for a release.[516]
Deus Ex (video game)2000?FPSHeaders and some code distributed with the official SDK.
Discworld and Discworld II19952008point-and-click adventure gameTeeny Weeny GamesFirst announced for release around 2005 by Terry Pratchett,[517] source code became in 2008 available to the ScummVM developers.[518] The code was fast integrated into ScummVM.[519]
Disney's Aladdin19932017PlatformerDisneyAround 2017 the source code of the game became available to "The Video game history foundation", which wrote a review of the technique of the game based on the code.[520]
Dog Daze19812014Arcade gameGray ChangIn 2014 Gray Chang released the source code of his Atari 8-bit games Dog Daze, Dog Daze Deluxe, Bumpomov's Dogs, and Claim Jumper.[521] Available at the Internet Archive.
Doom (Jaguar)19942003FPSId SoftwareOn April 27, 2003, the source code of the Atari Jaguar port of the game was released by Albert Yarusso of AtariAge with permission of John Carmack.[522]
Duke Nukem 3D19962003FPS3D Realms / Ken SilvermanGame source released on April 1, 2003.[523] Update builds and source ports like eduke32 followed by the game's community.[524]
Dungeon Defenders20102011Tower defenseTrendy EntertainmentIn November 2011 there was a "development kit" released as free DLC which included the game's source code.[525]
Elite19841999Space trading gameFreewareIan Bell, David BrabenIn November 1999, developer Ian Bell released on the game's 15th birthday the BBC Micro assembly source code on his website.[526] [527] Following that, Christian Pinder created a platform-neutral C version from the released BBC Micro version, called Elite: The New Kind (E-TNK; sources were removed in 2003 on David Braben request).[528] [529] In 1999–2000 a dispute occurred between Ian Bell and David Braben regarding Bell's decision to make available all versions of the original Elite.[530] The dispute has since ended and the various versions are now available again on Bell's site.[531] [532]
20002003Helicopter Flight simulatorown license[533] RazorworksGame source was released somewhen 2003 by Razorworks.[534]
Even the Ocean20162023action-adventureAnalgesic ProductionsThe entire source code for the game was uploaded under proprietary terms on GitHub on September 23, 2023.[535]
Escape from Monster Manor19932022FPSStudio 3DOOn August 8, 2022, Leo Schwab (programmer of the game) uploaded the entire source code for the game on GitHub.[536]
19972021Point and click adventureThe Dreamers GuildThe Wyrmkeep Entertainment provided the original source code to the ScummVM team in May 2021.[537]
Far Cry (video game)2004?FPSCrytekGame code was officially released with the SDK.
F.E.A.R.2005?FPSMonolith ProductionsHeaders and some code distributed with the official SDK.
The Feeble Files19972005AdventureAdventure SoftThe source code of the games was made available to ScummVM in 2005.[538]
Fight for Life19962008FightingAtari CorporationReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
Flight of the Amazon Queen19952003AdventureInteractive Binary IllusionsThe source code of the games was made available to ScummVM in 2004.
Freedom Force20022002 (partly)FPSIrrational GamesGame logic written in Python. Scripts are located in the game directory.
FreeSpace 2 (now FreeSpace 2 Source Code Project)19992002Space SimNon-commercial/ProprietaryVolitionGame source released by Volition on April 25, 2002.[539]
Galaforce19862019Shoot 'em upSuperior SoftwareIn March 2019 the source code of Galaforce in BBC Micro 6502 assembly language was released by Kevin Edwards, designer of the game.[540] In April of the same year Edwards released the source code for the Acorn Electron version.[541]
Gothic 320062007RPGJoWoodSource code was opened by JoWood for the members of "Community patch project" from the game community in 2007.[542]
Grand Monster Slam19892017Fantasy sports game?Rolf Lakaemper, Hartwig NiedergasselIn March 2017 the source code of the game became available via the Internet Archive.[543]
Hack 'n' Slash20142014Zelda-like puzzle game?Double FineWith the 1.0 release on September 9, 2014, the source code of the game was also released by Double Fine.[544] [545]
Hacker Evolution: Source code20072015Hacker game?ExosyphenReleased on May 11, 2015 for $49.95 by the indie game developer.[546]
Heartlight19902005Action-adventure??X LanD Computer Games / Janusz PelcThe 8-bit Atari source code became available around 2005.[547] Other games like Robbo became available too.
20002001Action-adventureRitual EntertainmentGame code distributed with the official editing tools / SDK.
Heretic II19981998Action-adventureRaven SoftwareGame code distributed with the official editing tools.
19952008Action-adventureLore Design LimitedReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
Homeworld19992003Space Real-time strategyNon-commercial license[548] Relic EntertainmentGame source released 2003.[549] The source code became the base of several source ports to alternative platforms, like Mac,[550] Linux, Pandora,[551] Maemo/N900,[552] or Android[553] [554] using the Simple DirectMedia Layer (SDL) cross-platform multimedia library. As the source code's license requirements limits further development significantly[555] the game's community aims for a re-licensing with the new IP holder Gearbox.[556] In September 2013 Gearbox responded positively to the idea for a re-licensing of the already published source code, noting their efforts in supporting the modding community.[557]
Hover Strike19952017ShooterAtari CorporationMade freely available on a Jaguar-dedicated Facebook group in May 2017.[558]
19952008ShooterAtari CorporationReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
Hundreds20102010Puzzle game??Greg Wohlwend / Semi SecretGreg Wohlwend chose to open source his code in 2010,[559] partly with the intent to spur "non-coders" to try coding, as he had.[560] [561] Programmer Eric Johnson of Semi Secret found the open source version and ported the game to iPad in a weekend before notifying Wohlwend, which was later released commercially in an updated version.
I-War (Atari Jaguar game)19952008ShooterImagitec DesignReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
Inherit the Earth19942005Point and click adventureThe Dreamers GuildIn 2005, Wyrmkeep Entertainment gave the source code for the game to the ScummVM Team for its inclusion in ScummVM.[562] [563]
Jim Power in Mutant Planet19922017Platform game??Digital ConceptAround 2017 the source code of Jim Power was rescued by Piko Interactive.[564]
Ken's Labyrinth19932001FPSNon-commercial licenseFreewareKen SilvermanKen's Labyrinth was released as freeware on November 16, 1999. The source code under a non-commercial license followed on July 1, 2001.[565] A port to modern operating systems such as Windows and Linux using Simple DirectMedia Layer called LAB3D/SDL was created by Jan Lönnberg and released in 2002.[566] A version of the port which includes new higher resolution textures was also created by Jared Stafford.[567]
1999?FPSXatrix EntertainmentGame code distributed with the official SDK.
The Labyrinth of Time19932016AdventureTerra Nova DevelopmentThe source code of the games was made available to ScummVM in 2016.[568]
Larva Mortus20082009Top-down shooterMIT/Non-commercial Rake in GrassCzech independent video game developer Pavel Tovarys released the Torque 2D v1.1.3 based source code in 2009 under non-commercial conditions.[569] [570] Several other games' source code were released too.[571] The code was taken offline after several games' IP were sold to another company. The source code is currently in no known repository on the web available.
20002020PinballLeft Field ProductionsOn May 11, 2020, Dave Ashley released the source code of the game on GitHub, along with a Game Boy Color emulator.[572]
The Lost Files of Sherlock Holmes: The Case of the Serrated Scalpel and The Case of the Rose Tattoo19922015AdventureMythos SoftwareOn 2015 Electronic Arts gave source code for both games to the ScummVM Team for their inclusion in ScummVM.[573]
MechCommander 220012006Real-time tacticsShared Source Limited Permissive License[574] FASA Interactive/MicrosoftSource opened under a Shared Source license by Microsoft in August 2006.[575] [576] As of 2017 there is a project fork on GitHub with the goal to port the source code to Linux.[577]
Miner Wars 2081201220136DOF Space Shooter gameown proprietary license[578] Keen Software House6DOF action-survival space-shooter simulation-game set in the year 2081. Full game and engine source code released under a restrictive license.
MiG Alley19992001Flight simulationRowan Software/Empire InteractiveSource opened by Rowan Software/Empire Interactive in 2001.[579] [580]
MoonBase Commander20022024turn-based strategyHumongous EntertainmentThe source code of the game was made available to the ScummVM developers in 2024.[581]
Mr. Do! (for Game Boy)19922007ArcadeUniversal Entertainment CorporationGame Boy version open sourced by developer Wesley Knackers in 2007 on his website.[582] [583]
Myth (series)19982001Real-time tacticsTake 2 Interactive/MumboJumboSource opened by Take 2 Interactive/MumboJumbo to the game community in 2001.[584] [585]
Nanosaur19982003FPSPangea SoftwareAround 2003 the Nanosaur source code was made available by the developer under a restrictive license.[586]
Nemesis the Warlock19872019Action gameCreative RealityOn May 19, 2019, Michael J. Archer uploaded the source code for the Commodore 64 version of the game to GitHub.
19982021AdventureTrecisionOn May 29, 2021, the ScummVM Team received the source code for the in-house game engine created by Trecision, and used for games like Nightlong: Union City Conspiracy, Ark of Time, and Alien Virus.[587]
Pariah20052005 (partly)FPSDigital ExtremesGame code available on GitHub.[588]
Pirate Adventure19781980adventure game??Scott Adams (game designer)The source code for Pirate Adventure was printed in the December 1980 issue of BYTE, with an addendum in April 1981.[589] [590] This enabled others to discover how the engine worked and to create their own adventures using this or a similar design.
Postal 220032003 (partly?)FPSRunning with ScissorsSome game code and tools distributed with the official game release.
Preppie!19822016action game??Russ Wetmore / Star Systems SoftwareIn January 2016 Russ Wetmore released the source code of his Atari 8-bit games Preppie! and Preppie II to the public on the Internet Archive.
Prince of Persia19892012Cinematic platformerJordan MechnerApple II source code was long-thought-lost,[591] but was found again and released in 2012.[592] A port of the assembly source code to C and SDL as backend was made by a community programmer.[593]
Rampage19882019Action gameSoftware Studios, Catalyst CodersOn May 19, 2019, Michael J. Archer uploaded the source code for the Commodore 64 conversion of the game to GitHub.
Rowan's Battle of Britain20002001Flight simulationEmpire Interactive LicenseRowan Software/Empire InteractiveSource opened by Rowan Software/Empire Interactive in 2001.[594]
Rune19992000FPSHuman Head StudiosHeaders and some code distributed with the official SDK.
Savant - Ascent20132015ActionD-Pad StudioSource code released in the Humble Weekly Bundle: Play and Create with GameMaker on September 17, 2015.[595] [596]
Sea Dogs: An Epic Adventure at Sea20002009pirate gameAkellaIn 2009 Akella agreed to hand the source code of Sea Dogs' game engine to the game community on end-of-support.[597]
20012001 (partly)FPSRebel Act StudiosGame logic written in Python. Scripts are located in the game directory.
Shadowgun: Deadzone20112015Shoot 'em upSHADOWGUN: DEADZONE PUBLIC LICENSE AGREEMENT[598] Madfinger GamesGame source and assets of the Unity 3.5 game were released some years after release.[599]
Shadowgrounds20052011Shoot 'em upown non-commercial license[600] FrozenbyteGame source released with a Humble Indie Bundle by Frozenbyte on April 22, 2011.[601]
Shadow Warrior19972005FPS3D RealmsGame source released on April 1, 2005.[602]
Silent Hunter II20012002submarine simulation?UbisoftAround 2002 Ubisoft had ended the official support while still significant issues existed. Therefore, Ubisoft enabled the game's community at Subsim.com to fix the game themselves by giving them the source code. The fans raised $7000 for an unofficial patch development project which fixed most of the issues.[603] The community extended Silent Hunter II also content wise significantly with expansion packs or texture upgrades.[604] [605]
Sin & 19981998FPSRitual EntertainmentGame code was officially released.
Sláine19872019AdventureCreative RealityOn May 19, 2019, Michael J. Archer uploaded the source code for the Commodore 64 version of the game to GitHub.
Soliter19942009[606] Puzzle gameOldsoftZdnek Stary developed at the Czech development studio Oldsoft the solitair game Soliter for the ZX Spectrum which got released in 1994. The game was released by the author in 2005 on his homepage for download, in 2009 the assembly source code followed as scan.
Soldier of Fortune2000?FPSRaven SoftwareGame code distributed with the official SDK.
2002?FPSRaven SoftwareGame code distributed with the official SDK.
Solstice20162016Visual novelMoaCubeSource code released in the Humble GameMaker Bundle on September 6, 2016.
The Space Bar19972024Point and click adventureBoffo GamesThe source code of the game was made available to the ScummVM developers in 2024.[607]
Space Engineers20132015space sandbox gameKeen Software HouseOn May 14, 2015, the development studio made the source code freely available to the game's community for easier modding on GitHub under a proprietary license (non-open source license).[608] [609] [610]
Star Fire19802020ArcadeExidyOn August 21, 2020, The History of How We Play uploaded to the Internet Archive the source code for Star Fire provided by David Rolfe, co-designer of the game.[611]
Star Raiders19792015space combat simulatorAric Wilmunder / AtariThe commented assembly source code scan of Star Raider became available in October 2015 in the Internet Archive as scan.[612] Aric Wilmunder opened it up with several other artifacts of his gaming career (e.g. SCUMM).[613] The community typed in the source code double checked in a GitHub project.[614] Shortly before a reverse engineering project was finished, too.[615] A true sequel, also called Star Raiders II, had been under development for some time by Aric Wilmunder. The never released prototype source code was posted publicly in December 2015.
20002000FPSRaven SoftwareGame code distributed with the official GDK. Holomatch multiplayer independently ported to ioquake3.
20022003FPSRitual EntertainmentIn November 2003 Ritual Entertainment released the source code of their server-side code base for multiplayer gaming under a non-commercial license.[616] [617]
Stealth Bastard Deluxe20122015StealthCurve DigitalSource code released in the Humble Weekly Bundle: Play and Create with GameMaker on September 17, 2015.
Taxman1981202?pacman clone??H.A.L. Labs / Brian FitzgeraldApple II pacman clone from 1981. In August 2015 Rebecca Heineman announced that original developer Brian Fitzgerald allowed to release the source code.[618] [619] GitHub repository is still empty as of July 2020.[620]
Tempest 2000 (Atari Jaguar)19942008Tube shooter?LlamasoftReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
Terminal Velocity19952015flight game??Mark Randel / Terminal RealityBecame available under a NDA in June 2015.[621] Work on an updated version for modern system started immediately.[622]
The Clue!19942000role-playing adventure gameown licenseown license / FreewareNeo SoftwareIn 2000 the source code was released to the public.[623] [624] The game is since then ported to modern platforms via SDL and receives still updates by the community (2015).[625]
The Guild of Thieves19872017adventure game??Magnetic ScrollsIn June 2017 Magnetic Scrolls worked on recovering the source code of their classics from tapes to remaster and re-release them.[626] [627]
The Wizard's Castle19802004role-playing adventure game??Joseph R. PowerThe BASIC source code of the 1980 developed game was published by the developer in the July/August 1980 issue of Recreational Computing.[628] Ports to other systems followed afterwards.[629]
The Wheel of Time19991999FPSLegend EntertainmentGame code and tools distributed with the official game release.
Tilt Brush20162021Room scaleGoogleThe Unity 2018.4.11f1 source code was uploaded to GitHub on January 26, 2021.[630]
Tony Tough and the Night of Roasted Moths20022012Point and click adventureNayma SoftwareIn 2012, DotEmu and Nayma Software gave the source code for this game to the ScummVM Team for its inclusion in ScummVM.[631]
Tornado19932017combat flight simulator?Digital Integration / Interplay EntertainmentIn March 2016 in the Tornado's community forum, rumors surfaced that Interplay Entertainment was working on a re-release of the game for digital distribution, based on the original source code.[632] The assembly source code finally surfaced in January 2017 on github.com.[633] [634]
Trevor McFur in the Crescent Galaxy19932008Shoot 'em up?Flare IIReleased by defunct Jaguar Sector II website under a CD compilation for PC titled Jaguar Source Code Collection on August 24, 2008. Source code was provided by Atari historian Curt Vendel.
Tron 2.020032009FPS??Monolith ProductionsSource code released with Lithtech Jupiter Enterprise b69 engine.
19832003Role-playing video gameKeith Zabalaoui / Sierra On-LineOn 11 June 2003, the game was ported to PC (under GPLv2 license) by Kasper Fauerby based on the original BASIC source code and some smaller binary reverse engineered parts.[635]
Unreal19982008FPSsource opened to the community under NDAEpic MegaGamesHeaders and some code distributed with the official SDK. Also, some pre-release version (v0.87) is available on the internet. Around 2008 access to source-code was granted by Epic MegaGames to the OldUnreal game community.[636] In 2015 Tim Sweeney announced that he hope to be able to open source one day the engine to the public.[637]
Unreal Tournament 9919992019FPSsource opened to the community under NDAEpic Games, Digital Extremes, Legend EntertainmentHeaders and some code distributed with the official SDK. Around 2019 access to source-code was granted by Epic MegaGames to the OldUnreal game community.[638]
Unreal Tournament 20032002?FPSEpic GamesGame code was officially released.
Unreal Tournament 20042004?FPSEpic GamesGame code was officially released.
Unreal Tournament 32007?FPSEpic GamesGame code was officially released.
Uplink20012003Hacking simulationIntroversion SoftwareMid-2003 Introversion Software started selling the source code for $45. Usage beside modding and fixing of the game are not permitted by the license.[639] Source code of the games Darwinia + Multiwinia and DEFCON was later sold too.[640]
2003?FPSLegend EntertainmentGame code and tools distributed with the official game release.
Video Checkers19802020BoardAtari, Inc.On April 8, 2020, Kay Savetz uploaded scans of the complete source code of the revision A of Video Checkers (a first-party video game for the Atari 2600) to the Internet Archive donated by its developer Carol Shaw.[641]
VVVVVV20102020platformersource availableTerry CavanaghOn the 10th anniversary of the game's release in January 2020, Kavanagh released the source code[642] for VVVVVV under a non-open source "VVVVVV Source Code License v1.0"[643] via GitHub.[644]
Warlords Battlecry III20042006RTSOwn proprietary licenseInfinite Interactive/Enlight SoftwareOn 24 May 2006, the Warlords Battlecry III source code became available to the public. Members of the community (who signed a NDA) have been entitled distributors, which have the legal permissions to allocate copies of the Warlords Battlecry III source code.[645] [646] The source code release resulted in the development of several community-made fan patches[647] [648] and mods.
War Worlds20132014RTSOwn permissive license[649] Own permissive licenseCodeka / Dean HardingThe mobile strategy game was originally released commercially,[650] and later released to the public to allow the community to continue the support of the game.[651] [652] With help of the community the game's main developer has continued the support since then.
Witchaven series19952006FPSnon-givenCapstone SoftwareAround 2006 Les Bird, a programmer from the 1996 folded game development company Capstone Software, released the source code of the games Witchaven, Witchaven II, William Shatner's TekWar and .[653]
Worms Armageddon19992002Deathmatch game?CommercialTeam17Around 2002 Team17, impressed by the reverse engineering on Worms Armageddon for "Silkworm",[654] gave David "Deadcode" Ellsworth access to the source code.[655] Over the next years he created unofficial patches, until he joined Team17 in 2006. Updates are still created as of 2015.[656]
Xenonauts20142015Turn-based tactics?Goldhawk InteractiveShortly after the release of the stable version Goldhawk Interactive allowed selected members of the community to access the source code.[657] This resulted in the community edition of the game (Xenonauts:Community Edition, X:CE), which continues development of an independent branch of the game, adding new features and bugfixes.[658]
XIII20032018 (partly)FPSUbisoft ParisThe UnrealScript source code of the game was made available on GitHub in January 2018.[659]

See also

External links

Notes and References

  1. The Law and Economics of Reverse Engineering. Samuelson. Pamela. Scotchmer. Suzanne. Yale Law Journal. May 2002. 111. 7. 1608. 10.2307/797533. 797533.
  2. Games as Cultural Heritage: Copyright Challenges for Preserving (Orphan) Video Games in the EU. Maier. Henrike. Jipitec. October 2015. October 30, 2021. 6. 2. 126. .
  3. Web site: Canabalt Open-Sourcing Your Game While It's Still Popular. Semi Secret Software. Saltsman. Adam. Adam Saltsman. December 6, 2011. August 9, 2013. https://web.archive.org/web/20130327081326/http://blog.semisecretsoftware.com/post/44317462620/open-sourcing-your-game-while-its-still-popul . March 27, 2013.
  4. Web site: John Carmack on DOOM Classic Development, Fan Questions . . . 17 July 2022 . https://web.archive.org/web/20140923021813/http://www.bethblog.com/2009/11/05/john-carmack-on-doom-classic-development-fan-questions/ . 23 September 2014 . 5 November 2009 . dead.
  5. Dunne . Alex . June 1999 . A Business Case for Publishing Source Code . . . 4 . 2022-06-28.
  6. Web site: Cavanagh . Terry . Terry Cavanagh (developer) . Featured VVVVVV Levels: 10th anniversary jam roundup . distractionware . 17 July 2022 . https://web.archive.org/web/20220220010606/https://distractionware.com/blog/2021/01/featured-vvvvvv-levels-10th-anniversary-jam-roundup/ . 20 February 2022 . 10 January 2021 . live.
  7. Web site: Rosen . David . Revenge of the Titan's will release its source code at 1.75M! . . 17 July 2022 . https://web.archive.org/web/20220621234246/http://blog.wolfire.com/2010/12/Revenge-of-the-Titans-will-go-open-source-at-1-75M . 21 June 2022 . 23 December 2010 . live.
  8. Web site: Rosen . Jeffrey . Counterfeit Lugaru on Apple's App Store (developing) . . 17 July 2022 . https://web.archive.org/web/20220516075559/http://blog.wolfire.com/2011/02/Counterfeit-Lugaru-on-Apple-s-App-Store-developing . 16 May 2022 . 3 February 2011 . live.
  9. Web site: Purchasing Abuse . 2007-09-07 . https://web.archive.org/web/20030610094112/http://abuse2.com/public_domain.php3 . 2003-06-10.
  10. https://www.gog.com/forum/general/abuse_1996_20th_anniversary_source_port Abuse 1996 - 20th anniversary source port
  11. https://github.com/antrad/Abuse_1996 Abuse_1996
  12. The Electric Eye . Herro, Mark . The Dragon . 42 . October 1980 . 42–43 hardcopy (aka electronic pagenumbers 44–45 in archived PDF version) . 2015-07-11 . live . https://web.archive.org/web/20150714132637/http://annarchive.com/files/Drmg042.pdf . 2015-07-14.
  13. News: Adventureland . SoftSide . July 1980 . 13 April 2015 . Adams . Scott . 36 . live . https://web.archive.org/web/20160328170952/https://archive.org/stream/softside-magazine-22/SoftSide_22_Vol_2-10_1980-07_Adventureland . 28 March 2016.
  14. Book: Graham, Nelson . The Inform Designer's Manual . Graham Nelson . 358 . Dan Sanderson . 2001 . 0-9713119-0-0 . live . https://web.archive.org/web/20151107005951/http://inform-fiction.org/manual/DM4.pdf . 2015-11-07.
  15. http://nl.aminet.net/game/shoot/AlienBash_src.readme AlienBash_src.readme
  16. http://eab.abime.net/showpost.php?p=1010237&postcount=239 AlienBash I & II - Original Coder Contacted - Help Needed in Rescuing 68000 Source!!
  17. Savetz . Kay . KaySavetz . 1377030385259802624 . 30 March 2021 . Need some new old 6502 assembly language code? Ed Fries graciously sent me the code for 5 of his Atari 8-bit games, and released them under an open-source license. 3 were published by Romox. 1 was unfinished/unpublished, and 1 was finished-ish? but unpublished. . 27 May 2021 . live . https://web.archive.org/web/20210413002106/https://twitter.com/KaySavetz/status/1377030385259802624 . 13 April 2021.
  18. Web site: Michael . Kurinnoy . AstroMenace Press Release . Viewizard . 2007-02-20 . 2010-03-08 . dead . https://web.archive.org/web/20110717202303/http://www.viewizard.com/press/AstroMenace_PR.pdf . 2011-07-17 .
  19. https://web.archive.org/web/20071012141500/http://viewizard.com/download.php?forceos=source Memonix game Source
  20. Web site: Siegler . Joe . Several old games released as Freeware . . 1 May 2020 . https://web.archive.org/web/20090323064443/http://www.3drealms.com/news/2009/03/several_old_games_released_as_freeware.html . 23 March 2009 . 20 March 2009 . live.
  21. Web site: Frigaard . Andy . "Bird Strike Q&A Thread" post #4 . stardot.org.uk . 21 June 2021 . https://web.archive.org/web/20210621174303/https://stardot.org.uk/forums/viewtopic.php?p=325768 . 21 June 2021 . 20 June 2021 . After a few enjoyable weeks of working through all the original uncommented code, I have posted the source to Github. . live.
  22. http://www.spiderwebsoftware.com/blades/opensource.html Blades of Exile Source Code
  23. http://www.clonk.de/source.php Source Code. "The complete source code of the following Clonk versions is available: Clonk Rage (current version) (engine, tools, and editor, VC6/VC7/VC9/MinGW/gcc/xcode) Clonk Endeavour 4.95.5 (engine only, VC6 or MinGW) Clonk Planet 4.65 (engine only, VC6) Clonk 3 Radikal (MS-DOS, Borland Turbo C++) Clonk 2 Debakel (MS-DOS, Borland Turbo C++) Clonk 1 (MS-DOS, Borland Turbo C++ [...] Clonk Source Code License (ISC License) Copyright (c) 2001-2014, RedWolf Design GmbH
  24. http://www.clonk.de/developer.php?lng=en Developer
  25. Announcement on Polish fan community page
  26. Somewhere Nearby is Colossal Cave: Examining Will Crowther's Original "Adventure" in Code and in Kentucky . . Jerz . Dennis . 2007 . 001 . 2 . . live . https://web.archive.org/web/20160616070717/http://www.digitalhumanities.org/dhq/vol/001/2/000009/000009.html . 2016-06-16.
  27. http://rickadams.org/adventure/e_downloads.html David Kinder's guide to Adventure downloads
  28. http://jerz.setonhill.edu/intfic/colossal-cave-adventure-source-code/ Colossal Cave Adventure Source Code
  29. http://www.ifarchive.org/indexes/if-archiveXgamesXsource.html adv350-pdp10.tar.gz
  30. https://motherboard.vice.com/en_us/article/the-first-text-adventure-game-ever-is-finally-open-source 'Colossal Cave Adventure' is due for an update.
  31. https://gitlab.com/esr/open-adventure open-adventure
  32. http://esr.ibiblio.org/?p=7540 The Adventure begins again
  33. https://web.archive.org/web/20020202142926/http://www.hardgeus.com/cylindrix/ cylindrix
  34. https://github.com/hyperlogic/cylindrix Cylindrix
  35. Web site: Citadel for Amiga (1995) MobyRank . MobyGames . 2020-03-04 . live . https://web.archive.org/web/20200304223157/https://www.mobygames.com/game/amiga/citadel/mobyrank . 2020-03-04.
  36. http://eab.abime.net/showthread.php?t=32835 the citadel source code
  37. http://amigaworld.net/modules/newbb/viewtopic.php?topic_id=22199&forum=42 Cytadela - need help in porting to AmigaOS
  38. http://cytadela.sourceforge.net/ Cytadela project - a conversion of an Amiga first person shooter
  39. Savetz. Kevin. KevinSavetz. 972121433563213824. 9 March 2018. I recovered the source code [of ''Dandy''] from floppy disk and posted it with the creator's permission.. no. 29 February 2020. https://archive.today/20200229175843/https://twitter.com/KevinSavetz/status/972121433563213824. 29 February 2020. live.
  40. https://github.com/jackpal/Dandy-Dungeon/commit/68a089573b2b9e6054f888031936ededb75adba6 The original Atari 8-bit version being added to GitHub
  41. http://www.atariage.com/2600/archives/source/Dragonfire_source/ Dragonfire source
  42. http://atariage.com/forums/topic/27236-dragonfire-source-code/#entry305264 Dragonfire Source Code
  43. http://www.biglist.com/lists/stella/archives/200208/msg00207.html [stella] Source code for Dragonfire from Bob Smith
  44. http://www.qotile.net/minidig/ minidig
  45. Web site: Duelyst to shut down servers forever . Jonathan . Bolding . January 25, 2020 . January 25, 2020 . PC Gamer.
  46. Web site: Chalk . Andy . Duelyst source code is now free for everyone, 'no strings attached' . . . 10 January 2023 . https://web.archive.org/web/20230110194246/https://www.pcgamer.com/duelyst-source-code-is-now-free-for-everyone-no-strings-attached/ . 2023-01-10 . 10 January 2023 . live.
  47. https://web.archive.org/web/20041209023803/http://hurricane-studios.ath.cx/news.html Eat The Whistle goes GPL!
  48. https://sourceforge.net/projects/etw/ Eat The Whistle
  49. http://www.ggsoft.org/etw/ Eat the Whistle
  50. https://web.archive.org/web/20041209023803/http://hurricane-studios.ath.cx/news.html Escape Towards The Unknown goes GPL!
  51. https://ettu.sourceforge.io/ Escape Towards The Unknown
  52. https://sourceforge.net/projects/ettu/ Escape Towards The Unknown GPL
  53. http://fillets.sourceforge.net/index.php Fish Fillets Next Generation
  54. https://web.archive.org/web/20030205053401/http://www.fsgames.com/glad/ glad
  55. http://snowstorm.sourceforge.net/cgi-bin/site.cgi?page=openglad openglad
  56. Web site: Glitch is Dead, Long Live Glitch! - Art & Code from the Game Released into Public Domain . The entire library of art assets from the game, has been made freely available, dedicated to the public domain. Code from the game client is included to help developers work with the assets. All of it can be downloaded and used by anyone, for any purpose. . tinyspeck . 2013-11-18 . 2013-12-11 . glitchthegame.com . dead . https://web.archive.org/web/20131213073818/http://www.glitchthegame.com/public-domain-game-art/ . 2013-12-13.
  57. Web site: Afterlife of an MMO: Glitch's offbeat art enters public domain . Laura . Blackwell . 2013-11-18 . 2013-12-11 . pcworld.com . live . https://web.archive.org/web/20131209192705/http://www.pcworld.com/article/2064273/afterlife-of-an-mmo-glitchs-offbeat-art-enters-public-domain.html . 2013-12-09.
  58. Web site: Kloodge . Source Code Released . . . 30 March 2020 . https://web.archive.org/web/20200330062427/https://steamcommunity.com/app/738470/discussions/0/2147595112905646560/ . 30 March 2020 . 27 March 2020 . live.
  59. Web site: The Gravity-Force 2 Homepage . Jan made an archaeological expedition and recovered the GF2 source code from a dusty old floppy disc! We do not pretend it is a wonder in coding style (in fact, it is a complete disaster!), but for primarily nostalgic interest we publish it here. . 2008-09-21 . 2013-10-13 . lysator.liu.se . Jens. Andersson. Jan . Kronqvist . live . https://web.archive.org/web/20131015001735/http://www.lysator.liu.se/~jensa/gf2/ . 2013-10-15.
  60. http://www.lysator.liu.se/~jensa/gf2/ gf2
  61. Web site: Bringing Habitat Back to Life . pastemagazine.com . 3 February 2016 . 2016-02-22 . live . https://web.archive.org/web/20160302071156/http://www.pastemagazine.com/articles/2016/02/bringing-habitat-back-to-life.html . 2016-03-02.
  62. Web site: The Habitat Hackathon . . 6 June 2016 . dead . https://web.archive.org/web/20160721130007/https://themade.org/posts/706 . 21 July 2016.
  63. Web site: Source code for Lucasfilm Games' '80s MMO Habitat released . Bryant . Francis . 2016-07-06 . 2016-07-06 . . live . https://web.archive.org/web/20160708091514/http://www.gamasutra.com/view/news/276548/Source_code_for_Lucasfilm_Games_80s_MMO_Habitat_released.php . 2016-07-08.
  64. https://www.engadget.com/2016/07/07/lucasfilm-games-mmo-habitat-code/ Lucasfilm Games' MMO 'Habitat' source code released
  65. https://www.ign.com/articles/2004/01/15/halloween-the-new-nightmare Halloween: The New Nightmare
  66. http://www.jadegame.com/games/halloween/ Halloween: The New Nightmare - Jadeware
  67. https://github.com/brizzly/Halloween3D Halloween: The New Nightmare
  68. http://insideastarfilledsky.net/ insideastarfilledsky.net/
  69. https://sourceforge.net/p/hcsoftware/game10/ci/default/tree/gameSource/ gameSource
  70. http://freegamer.blogspot.de/2011/03/inside-star-filled-sky-public-domain.html Inside a Star-Filled Sky (Public Domain For-Pay) + Video Review + Jason Rohrer on open source
  71. https://web.archive.org/web/20050307040107/http://www.strotmann.de/twiki/bin/view/APG/GameKaiserZwo GameKaiserZwo
  72. https://web.archive.org/web/20171027231602/http://www.abbuc.de/news-feeds-component/608-608 Kaiser II unter GNU Public License
  73. Six Business Management Games . jpg . . 8 . 4 . April 1982 . 28, 30 . . live . https://web.archive.org/web/20160916092002/https://archive.org/stream/creativecomputing-1982-04-a/Creative_Computing_v08_n04_1982_April . 2016-09-16.
  74. http://www.strout.net/files/lemonade-source.zip lemonade-source.zip
  75. http://codenautics.com/lemonade/ Lemonade Stand
  76. http://blog.wolfire.com/2010/05/Lugaru-goes-open-source Lugaru goes open source
  77. https://gitlab.com/osslugaru/lugaru/commit/51203b531b2054a8a7c40356e2108a5ec7b9f366 Relicensing all Wolfire Lugaru assets to CC-BY-SA 3.0
  78. https://osslugaru.gitlab.io/ osslugaru.gitlab.io
  79. http://freegamer.blogspot.de/2017/01/fully-open-source-3d-killer-rabbit.html Fully Open Source 3D Killer Rabbit | Lugaru HD 1.1
  80. Web site: Maelstrom: Changeset 8:0e3d2ddd9add . 2010-05-18 . live . https://web.archive.org/web/20110716182600/http://hg.libsdl.org/Maelstrom/rev/0e3d2ddd9add . 2011-07-16.
  81. http://www.snappymaria.com/megaball/ megaball
  82. https://bitbucket.org/emackey/megaball/src megaball
  83. http://sourceforge.net/projects/nogravity/?source=navbar No Gravity (Classic)
  84. https://web.archive.org/web/20150224054339/http://www.nothingtohide.cc/ nothingtohide.cc
  85. https://github.com/ncase/nothing-to-hide/blob/master/LICENSE Nothing to hide license
  86. https://www.rockpapershotgun.com/2014/02/12/nothing-to-hide-is-a-very-smart-anti-stealth-game/#more-189283 Nothing To Hide Is A Very Smart Anti-Stealth Game
  87. http://indiegames.com/2014/02/demo_crowdfunding_nothing_to_h.html Demo + Crowdfunding: anti-stealth game Nothing To Hide takes its name literally
  88. https://blog.creativecommons.org/tag/cc0-public-domain-dedication/ Attention game designers: Public Domain Jam!
  89. https://web.archive.org/web/19981203041908/http://tahna.tky.hut.fi/pt2/pt2.html pt2
  90. https://github.com/nnevatie/paybacktime2 paybacktime2
  91. Budge . Bill . Bill Budge . BillB . 301398071156277248 . 12 February 2013 . I just pushed the source for Pinball Construction Set to GitHub (thanks to Scott Cronce at EA) . no . 16 June 2016 . https://web.archive.org/web/20180811204629/https:/twitter.com/BillB/status/301398071156277248 . 11 August 2018 . live.
  92. Web site: billbudge/PCS_Atari800 . Budge . Bill . . February 13, 2013 . live . https://web.archive.org/web/20130725125346/https://github.com/billbudge/PCS_Atari800 . July 25, 2013.
  93. Web site: PCS_AppleII . Budge . Bill . . February 13, 2013.
  94. Web site: Blupi-games/Planetblupi. GitHub. 14 May 2021.
  95. http://devel.schroetersa.ch/blupi.org/planet.html Planet Blupi
  96. Web site: blupi.org . blupi.org . 2018-06-02.
  97. Web site: x.com . 2024-06-10 . X (formerly Twitter).
  98. Web site: x.com . 2024-06-10 . X (formerly Twitter).
  99. http://textfiles.com/bitsavers/bits/DEC/pdp1/papertapeImages/20031202/SteveRussell_box1/_text/ Spacewar! assembly source code
  100. https://web.archive.org/web/20040524122639/http://www.crosscutgames.com/ RuneSword 2 FREE!
  101. http://sourceforge.net/projects/runesword/ runesword 2
  102. Web site: Rollenspiel RuneSword 2 ist ab sofort Open Source – Kompletter Source Code steht zum Download bereit . 2004-04-19 . 2015-08-04 . Thorsten . Wiesner . golem.de . german . live . https://web.archive.org/web/20150924023049/http://www.golem.de/0404/30853.html . 2015-09-24.
  103. https://sourceforge.net/projects/runesword/files/ 2.6.3 patch
  104. https://web.archive.org/web/20061225003242/http://www.ryzom.org/ Free Ryzom campaign
  105. Web site: Virtual Citizenship Association – Virtual Worlds, Real Citizens . Virtualcitizenship.org . https://web.archive.org/web/20071029122004/http://www.virtualcitizenship.org/ . 2007-10-29. 2009-10-14.
  106. Web site: Breakthrough for Free Software Gaming--Ryzom Announces Full Release of Source Code and Artwork, and a Partnership with the Free Software Foundation to Host a Repository of the Game's Artistic Assets . ryzom.com . 2010-05-06 . dead . https://web.archive.org/web/20100509020615/http://dev.ryzom.com/news/13 . 2010-05-09.
  107. Web site: Ryzom is opening a new website for its Free Software NeL 3D MMORPG engine. . Ryzom . 2008-09-08 . 2009-10-14 . dead . https://web.archive.org/web/20090217182022/http://forums.ryzom.com/showthread.php?t=32696 . 2009-02-17.
  108. http://7kfans.com/?p=96 7kfans.com/?p=96
  109. http://www.enlight.com/7k/ enlight.com/7k/
  110. http://www.donhopkins.com/home/micropolis/ micropolis license
  111. Web site: SimCity Source Code Released to the Wild! Let the ports begin... . [...]Don Hopkins got a lot of work done on the finishing touches on releasing the original SimCity source code under the GNU General Public Library (GPL). The code won't have reference to any SimCity name as that has all be renamed to Micropolis. Micropolis was the original working title of the game and since EA requires that the GPL open source version not use the same name as SimCity (to protect their trademark) a little work had to be done to the code. . 2008-01-10 . Bil . Simser . weblogs.asp.net/bsimser . 2012-12-30 . live . https://web.archive.org/web/20140510093537/http://weblogs.asp.net/bsimser/archive/2008/01/10/simcity-source-code-released-to-the-wild-let-the-ports-begin.aspx . 2014-05-10.
  112. http://www.kickstarter.com/projects/1805029723/sissyfight-2000-returns sissyfight-2000-returns
  113. http://www.kickstarter.com/projects/1805029723/sissyfight-2000-returns/posts/496122 post
  114. https://github.com/moonmilk/sissyfight/ sissyfight
  115. Web site: Soldat 1.8 has been released as open source! . . . 26 June 2020 . 25 May 2020.
  116. Web site: Marcinkowski . Michael . Soldat source code released and a story of how it all started . . . 26 June 2020 . https://web.archive.org/web/20200615121426/https://www.gamasutra.com/blogs/MichaelMarcinkowski/20200526/363614/Soldat_source_code_released_and_a_story_of_how_it_all_started.php . 15 June 2020 . 26 May 2020 . live.
  117. https://github.com/Soldat/base/commit/02b87a8f082e8d510f9aee5bd8ca71e92fd49842 Soldat asset license
  118. Web site: Sopwith Code Support . https://archive.today/20120718082412/http://tech.groups.yahoo.com/group/sopwith/message/27 . dead . July 18, 2012 . 2006-12-01 . Clark . Dave . 2000-10-29.
  119. Web site: Sopwith – Source Code . 2006-12-01 . Clark . Dave . Dave Clark's Home Page . dead . https://archive.today/20120206011933/http://www.davidlclark.com/index.html?http://www.davidlclark.com/sopwith/sourcecode.html . 2012-02-06.
  120. http://macintoshgarden.org/games/duane-blehms-source-code Duane Blehm's Source Code
  121. Web site: Brouwer . Shane . Super Lemonade Factory releases source code . 10 July 2016 . https://web.archive.org/web/20160721131017/http://initialscommand.com/main/?p=656 . 21 July 2016 . 27 July 2012 . dead.
  122. Brouwer . Shane . initials_games . 1356521699588464645 . 2 February 2021 . Do you remember Super Lemonade Factory. It's free now on itch.io. I've also added back the cute run cycle gifs to the page. It's been 10 years of bubbly fun, it's time to open source the art and code. . 1 October 2021 . live . https://web.archive.org/web/20211001153232/https://twitter.com/initials_games/status/1356521699588464645 . 1 October 2021.
  123. Brouwer . Shane . initials_games . 1357172820640337922 . 4 February 2021 . So do you remember the OUYA preservation effort? I've just dumped the source code for Super Lemonade Factory for OUYA and you're welcome to do whatever you want with it . 1 October 2021 . live . https://web.archive.org/web/20211001153605/https://twitter.com/initials_games/status/1357172820640337922 . 1 October 2021.
  124. http://sourceforge.net/projects/triplane/files/ Triplane Classic
  125. https://github.com/vranki/triplane Triplane Classic - a side-scrolling dogfighting game
  126. http://www.lostgarden.com/2007/04/free-game-graphics-tyrian-ships-and.html Free game graphics: Tyrian ships and tiles
  127. http://www.lostgarden.com/2007/03/lost-garden-license.html Lost garden license
  128. https://hutsellgames.com/blog/ Civil War Strategy Game 2.10 RELEASED!
  129. https://github.com/davidshq/civilwarstrategygame The source code for the classic Civil War Strategy Game by W.R. Hutsell.
  130. https://www.kickstarter.com/projects/gavan/voxel-quest voxel-quest
  131. http://www.voxelquest.com/news/first-release First Release!!!
  132. https://github.com/gavanw/vqisosmall vqisosmall
  133. https://ahopeful.wordpress.com/2015/04/22/wander-1974-a-lost-mainframe-game-is-found/ Wander (1974) — a lost mainframe game is found!
  134. https://bluerenga.wordpress.com/2015/04/23/wander-1974-release-and-questions-answered/ Wander (1974) release, and questions answered
  135. https://github.com/swisspol/WaterRace WaterRace
  136. http://www.warfareincorporated.com/xyzzy/viewtopic.php?t=9001 Warfare Incorporated has been open sourced
  137. https://github.com/spiffcode/hostile-takeover hostile-takeover
  138. https://pyra-handheld.com/boards/threads/warfare-incorporated-now-open-source-hostile-takeover.74798/page-2 Warfare Incorporated now Open Source Hostile Takeover
  139. http://forums.wz2100.net/viewtopic.php?f=6&t=1818#p17202 Updated GPL release readme
  140. Savetz . Kay . KaySavetz . 1372225168731295751 . 17 March 2021 . Thanks to [John Keoni Morris] we have recovered the source code for the Commodore 64 version of "Worms?" (Electronic Arts, 1983.) The creator, David S. Maynard, has released the code with a free software license. I recovered the Atari version last week. . 21 March 2021 . live . https://web.archive.org/web/20210317163654/https://twitter.com/KaySavetz/status/1372225168731295751 . 17 March 2021.
  141. https://github.com/devshane/zork The DUNGEON (Zork I) source
  142. http://www.ifarchive.org/indexes/if-archiveXgamesXsource.html dungeon-3.2A.tar.Z (05-Oct-1994)
  143. https://github.com/itafroma/zork-mdl itafroma/zork-mdl
  144. https://www.kotaku.com.au/2017/08/zork-source-code-is-a-master-class-in-game-developer-trolling/ zork-source-code-is-a-master-class-in-game-developer-trolling
  145. Web site: Sweeney . Tim . Tim Sweeney (game developer) . The Official ZZT Home Page . https://web.archive.org/web/19991010013339/http://www.epicgames.com/zzt.htm . October 10, 1999 . dead . . Please don't ask for the source; if I had it, I'd release it, but I lost it in a crash a long time ago..
  146. Siekierka . Adrian . cbrzeszczot . 1619439008827973632 . 28 January 2023 . According to [Tim Sweeney], the original ZZT source code was lost in the early 90s: "[... If] I had it, I'd release it, but I lost it in a crash a long time ago." But they were all of them deceived, for another backup was made. . 31 January 2023 . live . https://web.archive.org/web/20230131040434/https://twitter.com/cbrzeszczot/status/1619439008827973632 . 31 January 2023.
  147. http://freespacecombatgame.com/allegiancelicense.txt allegiancelicense.txt
  148. Web site: Colayco. Bob. Microsoft pledges Allegiance to its fanbase . https://web.archive.org/web/20131210103542/http://www.gamespot.com/articles/microsoft-pledges-allegiance-to-its-fanbase/1100-6087574/. 2013-12-10. gamespot.com. 2011-07-22. 2004-02-06.
  149. Web site: Horvitz. Eric . Allegiance Relicense Letter. Director, Microsoft Research . 2017-07-28. 2017-07-28.
  150. https://github.com/ExiguusEntertainment/AmuletsArmor AmuletsArmor
  151. http://amuletsandarmor.com/forum/index.php?topic=31.msg100#msg100 source code
  152. http://amuletsandarmor.com/forum/index.php?topic=198.msg1009#msg1009 Questions regarding codebase
  153. https://github.com/emrecelikten/AmuletsArmor AmuletsArmor
  154. http://www.ambrosiasw.com/games/ares/ Ares
  155. http://arescentral.org/antares/ Antares
  156. Web site: Avara game, originally released in 1996 for Mac OS . Juri . Munkki . . 2016-10-30 . 2016-10-30 . live . https://web.archive.org/web/20161216094116/https://github.com/jmunkki/Avara . 2016-12-16.
  157. http://sourceforge.net/projects/raceintospace/ sourceforge.net/projects/raceintospace
  158. https://web.archive.org/web/20070710110823/http://www.geocities.com/raceintospace/CopyrightInfo.txt CopyrightInfo.txt
  159. Web site: Cart Life exits Steam, goes open source . 20 March 2014 . 21 March 2014 . Omri . Petitte . . live . https://web.archive.org/web/20140322001348/http://www.pcgamer.com/uk/2014/03/20/cart-life-open-source/ . 22 March 2014.
  160. https://archive.today/www.richardhofmeier.com www.richardhofmeier.com
  161. http://indiegames.ch/die-geheimen-projekte-des-richard-hofmeier/ Die geheimen Projekte des Richard Hofmeier
  162. https://github.com/gondur/cartlife_src cartlife_src
  163. http://tidegear.net/corncob/index.html Corncob 3D and the Corncob Other Worlds Campaign
  164. http://www.rtsoft.com/forums/showthread.php?691-Dink-Smallwood-Source-License Dink-Smallwood-Source-License
  165. http://www.rtsoft.com/forums/showthread.php?691-Dink-Smallwood-Source-License Dink-Smallwood-Source-License
  166. Web site: Files | Dink Smallwood Source Code . 2015-01-06 . live . https://web.archive.org/web/20150106162942/http://www.dinknetwork.com/file/dink_smallwood_source_code/ . 2015-01-06.
  167. https://www.gnu.org/software/freedink/doc/sounds/ Find free sounds for FreeDink
  168. https://www.codedojo.com/?p=2087 Dink Smallwood HD 1.89 released, made free on all platforms
  169. https://github.com/svn2github/DinkSmallwoodHD DinkSmallwoodHD
  170. http://trisquel.info/en/forum/br%C3%A1ny-skeldalu-aka-gates-skeldal-ready-testing Brány Skeldalu (aka The Gates of Skeldal) is ready for testing
  171. http://sourceforge.net/p/skeldal/code/HEAD/tree/ skeldal
  172. Web site: Brány Skeldalu Download, English Patch (Beta) :: DJ OldGames . oldgames.sk . 18 January 2014 . live . https://web.archive.org/web/20140201194838/http://www.oldgames.sk/en/game/brany-skeldalu/download/5016/ . 1 February 2014.
  173. Web site: Get a window into classic Mac dev with Glider source code . Nutt . Christian . 12 February 2016 . . . 17 August 2020 . live . https://web.archive.org/web/20160924052716/http://www.gamasutra.com/view/news/265823/Get_a_window_into_classic_Mac_dev_with_Glider_source_code.php . 24 September 2016 . Classic Mac game dev John Calhoun has released the source code for four of his games -- Glider, Glider Pro, Glypha III, and Pararena -- onto GitHub..
  174. Web site: Sources for the Macintosh game, Glider PRO, written by John Calhoun and published by Casady & Green Inc. . . 2016-01-29 . Calhoun . John . live . https://web.archive.org/web/20160321132956/https://github.com/softdorothy/glider_pro . 2016-03-21.
  175. Web site: Added legal section to read me. · softdorothy/glider_pro@49a35bb · GitHub . 2016-01-31 . Calhoun . John . GitHub . 2016-03-16 . live . https://web.archive.org/web/20160721130823/https://github.com/softdorothy/glider_pro/commit/49a35bb15b7c6cf5febebc5c26bb65140a7c4957 . 2016-07-21.
  176. - Source code of Gloom released in May 2017
  177. https://github.com/earok/GloomAmiga/blob/master/LICENSE LICENSE
  178. https://web.archive.org/web/20020922043325/http://gunocide.polyfrag.com/ gunocide
  179. http://home.mayn.de/comrad/documents/vsgarage_deutsch vsgarage_deutsch
  180. https://www.linux-user.de/ausgabe/2002/02/014-software/software.html?print=y software
  181. https://sourceforge.net/projects/g2ex/ g2ex
  182. https://web.archive.org/web/20071014053429/http://irrgheist.com/contact.htm contact
  183. https://web.archive.org/web/20071016044942/http://www.irrgheist.com/hcraftpurchase.htm H-Craft Championship Purchase
  184. http://www.cdnavigator.ru/Game.aspx?id=98 H-Craft Championship
  185. https://www.reddit.com/r/IndieGaming/comments/20qmff/today_we_released_a_7yearsold_3dscifi_racer/ H-Craft Championship
  186. http://www.irrgheist.com/index.htm H-Craft Championship
  187. http://www.irrgheist.com/hcraftsource.htm H-Craft Championship - H-Craft Source Code
  188. https://web.archive.org/web/20130719081028/http://www.mobrulesgames.com/about/ about
  189. https://www.kickstarter.com/projects/2066438441/haunts-the-manse-macabre haunts
  190. http://www.escapistmagazine.com/news/view/120314-Troubled-Haunts-Kickstarter-Goes-Open-Source Troubled-Haunts-Kickstarter-Goes-Open-Source
  191. https://github.com/MobRulesGames/haunts haunts
  192. https://github.com/losinggeneration/haunts haunts
  193. https://forum.freegamedev.net/viewtopic.php?f=20&t=7296&p=71956 Hypercycles
  194. https://github.com/marespiaut/hypercycles hypercycles
  195. http://www.pcgamer.com/infinity-game-boy-game-pc/ After 15 years, a cancelled Game Boy RPG finds life on PC
  196. https://github.com/infinity-gbc/infinity infinity
  197. http://affinix.com/ Infinity Released (August 13, 2016)
  198. Web site: 2021-08-11. Cancelled Game Boy Color RPG Infinity Goes Live On Kickstarter Next Week. 2021-08-26. Nintendo Life. en-GB.
  199. Web site: Infinity GBC. 2021-08-26. Infinity GBC. en-US.
  200. http://ironseed.com/ Latest Patches
  201. http://www.browsergame-magazin.de/wooga-veroeffentlicht-quellcode-von-html5-spiel-magic-land-island/ wooga-veroeffentlicht-quellcode-von-html5-spiel-magic-land-island
  202. https://github.com/wooga/Pocket-Island Pocket Island
  203. Web site: Marathon 2 Source Code Released . 2000-01-17 . Today at 7 pm CST Bungie Software releases the Mac source code for their classic game "Marathon 2: Durandal" to the net. . mactech.com . 2012-12-25 . live . https://web.archive.org/web/20140820200818/http://www.mactech.com/content/marathon-2-source-code-released-0 . 2014-08-20.
  204. Web site: Osborne . Eric . Burn Bright. Burn Blue. . . 19 October 2020 . https://web.archive.org/web/20110626012108/http://www.bungie.net/News/content.aspx?type=topnews&link=burnbright . 26 June 2011 . 23 June 2011 . dead.
  205. Web site: License for Meridian 59 v1.0 . 2012-09-15 . 2013-10-08 . Andrew. Kirmse. Chris . Kirmse . This source code is distributed under the terms of the GNU General Public License with the following special exception. As a special exception, the copyright holders of this program give you permission to link this program with the accompanying files wrap.dll and waveplay.dll. . . live . https://web.archive.org/web/20151026022751/https://github.com/Meridian59/Meridian59/blob/master/LICENSE . 2015-10-26.
  206. https://web.archive.org/web/20040603005146/http://www.plasmaworks.com/pits/index.html Pit Puzzle
  207. https://github.com/LaPingvino/The-Puzzle-Pits The-Puzzle-Pits
  208. Running With Scissors . Running with Scissors (company) . RWSbleeter . 633178225506668544 . 17 August 2015 . We're going to release the POSTAL 1 source code soon, but only if someone promises to port it to the Dreamcast. . no . 18 December 2016 . https://web.archive.org/web/20180414093055/https://twitter.com/rwsbleeter/status/633178225506668544 . 14 April 2018 . live.
  209. Running With Scissors . Running with Scissors (company) . RWSbleeter . 738064875205758976 . 1 June 2016 . POSTAL 1 running on Open Pandora. P1 is being opened sourced in the near future! . no . 18 December 2016 . https://web.archive.org/web/20170604023110/https://twitter.com/RWSbleeter/status/738064875205758976?ref_src=twsrc%5Etfw . 4 June 2017 . live.
  210. https://pyra-handheld.com/boards/threads/postal-source-code.77447/#post-1380531 Postal Source Code
  211. http://runningwithscissors.com/?p=2318 The Original POSTAL Has Been Made Open Source
  212. https://bitbucket.org/gopostal/postal-1-open-source/src/cb472b6cc8e19a9fedeb35f5028be439025d6886/LICENSE?at=default&fileviewer=file-view-default license
  213. https://web.archive.org/web/*/http://parallelrealities.co.uk/LICENSE parallelrealities.co.uk/LICENSE LICENSE
  214. http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=546800 Debian bug #546800 - RM: starfighter -- RoM; copyright infringement
  215. Web site: The Ur-Quan Masters . Howard . Wen . 2005-08-11 . 2016-01-19 . When the original developers of Star Control 2 contacted the online Star Control fan community, they presented an enticing question: if they released the source to the 3DO version of Star Control 2 under GPL, would anybody be interested in porting it to modern-day computers? Michael Martin, a 26-year-old Ph.D. student at Stanford University, answered the call. After removing proprietary 3DO-specific components from the code, the developers released the source for Star Control 2 to the public. . . linuxdevcenter.com . live . https://web.archive.org/web/20160119155826/http://www.linuxdevcenter.com/pub/a/linux/2005/08/11/ur-quan.html . 2016-01-19.
  216. http://steamcommunity.com/games/star-ruler-2/announcements/detail/126438500983066427 1.0 release
  217. Web site: Star Ruler 2 is now Open Source!. DeVries. Lucas. July 22, 2018. Official Star Ruler 2 discussion board on Steam . https://archive.today/20180724231921/https://steamcommunity.com/app/282590/discussions/1/1710690176754840807/. July 24, 2018. July 24, 2018.
  218. Web site: Blind Mind Studios releases source code for Star Ruler 2. 2018-07-24. Chris . Kerr . Gamasutra.
  219. Web site: Starshatter: The Gathering Storm Goes Open Source! . Brian . Rubin . 2012-01-16 . 2013-01-08 . spacegamejunkie.com . Apparently the excellent and unique military space sim, Starshatter: The Gathering Storm, has gone open source thanks to its original developer releasing the source code. [...]: "14 DEC, 2011 – STARSHATTER:THE GATHERING STORM – Open Source Version 5.0.5. This download Includes the cumulative Starshatter-TGS game up to version 5.0.5 (No CD Required). It is available for download from our "Lagacy Official File" section." . live . https://web.archive.org/web/20120615162635/http://www.spacegamejunkie.com/news/starshatter-the-gathering-storm-goes-open-source/ . 2012-06-15.
  220. Web site: Because Stars Matter: Starshatter (Sci-Fi Flight Sim) is Free! . 2012-02-06 . 2012-01-08 . doctorfrog . drfrog.wordpress.com . Starshatter: The Gathering Storm is a moderately complex, moderately realistic, spaceborne military flight sim that takes place in a series of dynamic campaigns. . live . https://web.archive.org/web/20120127010210/http://drfrog.wordpress.com/ . 2012-01-27.
  221. http://www.digital-eel.com/sais/source.htm source
  222. http://www.infinitespacegames.com/sais/ sais
  223. https://www.rockpapershotgun.com/2009/10/07/strange-adventures-in-infinite-space-free/ strange-adventures-in-infinite-space-free
  224. https://github.com/kuroneko/sais/tree/bac822237d81289459479315e42a7a744372a02b GitHub commit on kuroneko/sais (2020-05-18)
  225. https://groups.google.com/forum/#!topic/alt.comp.shareware/AWH376XBDrU 47-TEK ships Team 47 GoMan for 10 D3D chips from www.47-tek.com
  226. https://web.archive.org/web/19990417064750/http://www.47-tek.com/source.htm source
  227. http://www.golem.de/9805/691.html 47-TEK gibt "Team 47: GoMan" Source Code frei
  228. http://www.vogons.org/viewtopic.php?t=34816 Looking for source code for Team 47 GoMAN
  229. https://www.longbowgames.com/forums/topic/?id=3623 Tread Marks 1.7.0 now free and open-source!
  230. https://github.com/LongbowGames/TreadMarks TreadMarks
  231. https://github.com/sago007/TreadMarks Treadmarks
  232. https://pyra-handheld.com/boards/threads/tread-marks.81596/ tread marks
  233. Web site: tribaltrouble . . live . https://web.archive.org/web/20141216232629/https://github.com/sunenielsen/tribaltrouble . 2014-12-16.
  234. https://github.com/team-penguin/tribaltrouble tribaltrouble
  235. http://www.garagegames.com/community/blogs/view/21876 GarageGames to Release T3D as Open Source
  236. Web site: It's here! The MIT licensed Torque 3D GitHub repo is ready! . live . https://web.archive.org/web/20120924024101/http://www.garagegames.com/community/blogs/view/21886 . 2012-09-24.
  237. http://www.garagegames.com/community/forums/viewthread/132755 Tribes 1 and 2 source code anywhere
  238. https://github.com/storm-devs/captain-blood Source code of the Captain Blood
  239. https://github.com/storm-devs/storm-engine Storm Engine source code
  240. https://store.steampowered.com/news/app/223330/view/3013444995188538670 Storm Engine source code announcement
  241. Web site: Grip . Thomas . Amnesia is now open source! . . 23 September 2020 . https://archive.today/20200923140608/https://frictionalgames.com/2020-09-amnesia-is-now-open-source/ . 23 September 2020 . 23 September 2020 . live.
  242. https://github.com/FrictionalGames/AmnesiaAMachineForPigs github.com/FrictionalGames/AmnesiaAMachineForPigs
  243. https://github.com/FrictionalGames/AmnesiaTheDarkDescent github.com/FrictionalGames/AmnesiaTheDarkDescent
  244. Web site: Love . Christine . Christine Love (writer) . Tumblr post #49592102340 . Love Conquers All Games . https://web.archive.org/web/20200527170736/https://loveconquersallgam.es/post/49592102340/ive-been-meaning-to-release-the-source-code-to . 27 May 2020 . 4 May 2013 . You can use the python code portions for whatever you like. I've also left in the script, but only for context; please don't interpret this as me releasing any sort of legal rights whatsoever to the writing in the game! (I apologize for even needing to say this, but… you know, lawyers.) . live.
  245. Web site: Grandstaff . Matt . Arx Fatalis source code, patch released! . . . 17 April 2020 . https://web.archive.org/web/20151007213705/http://bethblog.com/2011/01/14/arx-fatalis-source-code-patch-released/ . 7 October 2015 . 11 January 2011 . dead.
  246. Web site: Arx Libertatis: cross-platform port of Arx Fatalis released . 21 April 2012 . Matthew . Humphries . 17 November 2012 . geek.com . What's interesting about Arx Fatalis is that development of the game started up again last year. Arkane Studios released patch 1.21 and with it open sourced the engine. That led to a new project called Arx Libertatis, which aimed to update the game to be played on multiple modern operating systems including Windows and Linux. . 3 July 2012 . https://web.archive.org/web/20120703050224/http://www.geek.com/articles/games/arx-libertatis-cross-platform-port-of-arx-fatalis-released-20120421 . dead.
  247. Web site: arx/ArxLibertatis . . 17 April 2015.
  248. News: Wolfire Games blog . 2010-06-03 . Aquaria goes open source! . live . https://web.archive.org/web/20130605211335/http://blog.wolfire.com/2010/06/Aquaria-goes-open-source . 2013-06-05.
  249. https://dl.dropboxusercontent.com/u/45949788/Blake%20Stone%20Planet%20Strike%20Source%20Code.rar source code
  250. Web site: Blake Stone: Planet Strike source code released after almost 20 years . 2013-07-08 . 2013-07-11 . Julian . Benson . . live . https://web.archive.org/web/20130710154207/http://www.pcgamesn.com/blake-stone-planet-strike-source-code-released-after-almost-20-years . 2013-07-10.
  251. Web site: Apogee Releases Blake Stone Source Code . . 1 May 2020 . https://web.archive.org/web/20130811121759/http://www.apogeesoftware.com/uncategorized/apogee-releases-blake-stone-source-code . 11 August 2013 . 8 July 2013 . dead.
  252. Web site: Popular indie game Canabalt goes open source . Kelly . Hodgkins . 2010-12-31 . The developers behind Canabalt confirmed that the game's source code will be made available as part of an open source project. The game will be licensed under the MIT Open Source license, which will let other developers use the engine source code in its entirety for both personal and commercial projects. While the code powering the game is available for the world to use, the game art, sounds, animations and Canabalt game-specific code is still proprietary. . tuaw.com . live . https://web.archive.org/web/20130630225405/http://www.tuaw.com/2010/12/31/popular-indie-game-canabalt-goes-open-source . 2013-06-30.
  253. Web site: id Software's Softdisk Open-Sources Some Really Old Games . Michael . Larabel . June 6, 2014 . June 6, 2014 . . dead . https://web.archive.org/web/20140609231037/http://www.phoronix.com/scan.php?page=news_item&px=MTcxMjM . June 9, 2014.
  254. Smith . David A. . David A. Smith (computer scientist) . gocroquet . 1666309176958541824 . 2023-06-07 . I just shared the source code for "The Colony" - the first realtime 3D adventure/shooter on Github. [...] . 2023-06-08 . live . https://web.archive.org/web/20230608123418/https://twitter.com/gocroquet/status/1666309176958541824 . 2023-06-08.
  255. Web site: The Command & Conquer source code is now available on GitHub . Dustin . Bailey . June 2, 2020 . October 18, 2020 . PCGamesN.
  256. Web site: PS Vita Release: Vanilla Conquer (Command & Conquer port) . Wololo.net . en-US . 15 Apr 2021.
  257. https://www.indiegogo.com/projects/let-s-get-keen-dreams-re-released-legally Let's get Keen Dreams re-released legally !
  258. http://games.slashdot.org/story/14/09/17/133228/commander-keen-keen-dreams-source-code-released commander-keen-keen-dreams-source-code-released
  259. https://github.com/keendreams/keen Keen source code
  260. Web site: CoreCode's CoreBreach Game Goes Open-Source . Michael . Larabel . 2012-11-02 . 2013-06-22 . . live . https://web.archive.org/web/20130512083152/http://www.phoronix.com/scan.php?page=news_item&px=MTIyMDU . 2013-05-12.
  261. Web site: 11th Independent Games Festival . . 2009-03-26 . 2009-03-30.
  262. Web site: Data Realms – Dev Log » Blog Archive » Cortex Command 1.0 playtest preview.
  263. https://www.gamingonlinux.com/articles/cortex-command-from-data-realms-goes-open-source.14567 cortex-command-from-data-realms-goes-open-source
  264. https://github.com/DataRealms/CCOSS DataRealms/CCOSS
  265. https://github.com/cortex-command-community/Cortex-Command-Community-Project-Source Cortex-Command-Community-Project-Source
  266. Web site: Kidwell . Emma . Delver devs release their tech publicly under open source license . . . 19 October 2020 . https://web.archive.org/web/20181117024545/http://www.gamasutra.com/view/news/330935/Delver_devs_release_their_tech_publicly_under_open_source_license.php . 17 November 2018 . 16 November 2018 . live.
  267. https://github.com/Interrupt/delverengine/commit/b82435d9c4ad42db9275c1a053c244ef7ecffdf2#diff-d0ed4cc3fb70489fe51c7e0ac180cba2a7472124f9f9e9ae67b01a37fbd580b7 GitHub commit on Interrupt/delverengine (2018-11-23)
  268. interruptgames . 1308185069924749313 . 21 September 2020 . Delver Engine is now licensed under the OSI approved open source zlib license! We'll stick to writing game engines, not software licenses. . no . 19 October 2020 . https://web.archive.org/web/20200921232449/https://twitter.com/interruptgames/status/1308185069924749313 . 21 September 2020 . live.
  269. Web site: Carter . Justin . Descent 3's source code has been released for free use . . . 16 April 2024 . https://web.archive.org/web/20240416170520/https://www.gamedeveloper.com/business/descent-3-s-source-code-has-been-released-for-free-use . 16 April 2024 . 16 April 2024 . live.
  270. Web site: Bentley . Kevin . Descent 3 Source Code . . . 16 April 2024 . https://web.archive.org/web/20240416122507/https://news.ycombinator.com/item?id=40048177 . 16 April 2024 . 16 April 2024 . Someone recently asked if the source code from Descent 3 will be released. I reached out to my old boss (Matt Toschlog) at Outrage Entertainment and he gave me the go ahead. I'm going to work on getting this running again and I'm looking for some co-maintainers. . live.
  271. Web site: Schreier . Jason . Jason Schreier . Descent Designer Says Interplay Owes Him Tens Of Thousands In Royalties . . . 16 April 2024 . https://web.archive.org/web/20230921150133/https://kotaku.com/descent-designer-says-interplay-owes-him-tens-of-thousa-1751619012 . 21 September 2023 . 7 January 2016 . live.
  272. Heineman . Rebecca . Rebecca Heineman . burgerbecky . 539193285982449664 . 30 November 2014 . Happy Thanksgiving, here's the ENTIRE source tree to DOOM 3DO, with my compliments! . no . 28 March 2020 . https://archive.today/20200328082316/https://twitter.com/burgerbecky/status/539193285982449664 . 28 March 2020 . live.
  273. Web site: Hurley . Leon . Here's Why the 3DO Port of DOOM Sucked . . . 28 March 2020 . https://web.archive.org/web/20150106010756/http://www.kotaku.co.uk/2014/12/12/heres-3do-port-doom-sucked . 6 January 2015 . 12 December 2014 . live.
  274. Web site: Purslow . Matt . Source code for Doom's 3DO port has been released online . . Network N . 28 March 2020 . https://web.archive.org/web/20141230220904/http://www.pcgamesn.com/doom/source-code-for-doom-s-3do-port-has-been-released-online . 30 December 2014 . 12 December 2014 . live.
  275. Prescott . Shaun . DOOM 3DO source code is now publicly available . . . 28 March 2020 . https://web.archive.org/web/20150303114220/http://www.pcgamer.com/doom-3do-source-code-is-now-publicly-available/ . 3 March 2015 . 16 December 2014 . live.
  276. Prescott . Shaun . Source code for the SNES version of Doom has been released . . . 20 July 2020 . https://web.archive.org/web/20200720054329/https://www.pcgamer.com/source-code-for-the-snes-version-of-doom-has-been-released/ . 20 July 2020 . 20 July 2020 . live.
  277. Web site: TTimo/doom.gpl3 . GitHub . 2011-11-22 . 2011-11-23 . live . https://web.archive.org/web/20130721074246/https://github.com/TTimo/doom3.gpl . 2013-07-21.
  278. Web site: Grandstaff . Matt . Source Code and Title Update for BFG Edition . . . 26 June 2020 . https://web.archive.org/web/20151011141720/http://www.bethblog.com/2012/11/26/source-code-and-title-update-for-bfg-edition/ . 11 October 2015 . 26 November 2012 . dead.
  279. http://forum.caravelgames.com/site/SourceCode Source Code
  280. http://forum.caravelgames.com/site/history History of DROD
  281. https://itchythumbs.wordpress.com/2008/07/30/deadly-rooms-of-death/ deadly-rooms-of-death
  282. http://forum.caravelgames.com/site/SourceCode SourceCode
  283. Web site: Eldritch developer releases source code for free . Owen . Dave . . 2014-04-16 . 2015-01-18 . live . https://web.archive.org/web/20150119050211/http://www.vg247.com/2014/04/16/eldritch-developer-releases-source-code-for-free/ . 2015-01-19.
  284. http://eldritchgame.com/bin/Eldritch-Source-2014-04-14.zip Eldritch-Source-2014-04-14.zip
  285. http://blendogames.com/news/post/2020-02-27-flotilla_source_release/ flotilla_source_release
  286. https://www.gamingonlinux.com/articles/blendo-games-have-open-sourced-their-strategic-space-adventure-flotilla.16097 blendo-games-have-open-sourced-their-strategic-space-adventure-flotilla
  287. https://github.com/blendogames/flotilla flotilla
  288. Web site: Indie game Gish source code released . https://web.archive.org/web/20121113190853/http://www.h-online.com/open/news/item/Indie-game-Gish-source-code-released-1013101.html. 13 November 2012. 2010-06-10 . Chris . von Eitzen . h-online.com . 2013-01-13.
  289. News: Wolfire Games blog . 2010-05-30 . Gish goes open-source . live . https://web.archive.org/web/20130111160822/http://blog.wolfire.com/2010/05/Gish-goes-open-source . 2013-01-11.
  290. Web site: The shareware game from the Macintosh written by John Calhoun in the 90's. . . 2016-01-29 . Calhoun, John . live . https://web.archive.org/web/20160721130914/https://github.com/softdorothy/glypha_III . 2016-07-21.
  291. http://toucharcade.com/2009/07/07/glypha-a-joust-like-game-now-on-iphone-for-free/ glypha-a-joust-like-game-now-on-iphone-for-free
  292. https://web.archive.org/web/20150911014731/http://boredzo.org/glypha/ Glypha - Then and Now
  293. https://ksuther.com/glypha/ glypha
  294. https://github.com/kainjow/Glypha glypha
  295. Web site: 11 Years of Pyrodactyl . Raja Yadav . Arvind . 4 August 2020 . Pyrodactyl Games . 4 August 2020 . live . https://web.archive.org/web/20200804073532/http://pyrodactyl.com/2020/08/04/11-years-of-pyrodactyl/ . 4 August 2020.
  296. http://hg.icculus.org/icculus/hge-unix/raw-file/tip/license.txt license.txt
  297. Web site: Humble Indie Bundle Sells Lots, Windows Users Still Cheap . 3 August 2011 . 3 August 2011 . Ryan . McLaughlin . Hot Hardware . live . https://web.archive.org/web/20111003094421/http://hothardware.com/News/Humble-Indie-Bundle-Sells-Lots-Windows-Users-Still-Cheap/ . 3 October 2011.
  298. http://blog.wolfire.com/2011/08/HGE-comes-to-Mac-and-Linux-guest-post-from-Ryan-Gordon HGE-comes-to-Mac-and-Linux-guest-post-from-Ryan-Gordon
  299. https://www.phoronix.com/scan.php?page=news_item&px=OTc1OQ Ryan Gordon Ports HGE To Linux, Then Releases Code
  300. https://icculus.org/hge-unix/ hge-unix
  301. https://github.com/kvakvs/hge hge - DX8.1 and 9.0
  302. Web site: Raven Software Presents: Heretic and Hexen Source Code Release Page . . 10 April 2020 . https://web.archive.org/web/20010124043400/http://www2.ravensoft.com/source/ . 24 January 2001 . 11 January 1999 . dead.
  303. Web site: Heretic/Hexen Source Code Released . . . 10 April 2020 . https://web.archive.org/web/20200410045101/https://www.gamespot.com/articles/heretic-hexen-source-code-released/1100-2460369/ . 10 April 2020 . 27 April 2000 . live.
  304. Web site: Frederick . Logan . Hexen and Heretic Code Opened Under GPL . . Themis Media . 10 April 2020 . https://web.archive.org/web/20080913101845/http://www.escapistmagazine.com/news/view/86131-Hexen-and-Heretic-Code-Opened-Under-GPL . 13 September 2008 . 8 September 2008 . live.
  305. Web site: Deleon . Nicholas . Hexen, Heretic source codes released under GPL . . Archimedes Ventures . 10 April 2020 . https://web.archive.org/web/20120214235228/http://techcrunch.com/2008/09/06/hexen-heretic-source-codes-released-under-gpl/ . 14 February 2012 . 6 September 2008 . live.
  306. Web site: Lee . Matt . Heretic and Hexen liberated! . . 10 April 2020 . https://web.archive.org/web/20080910080952/http://www.fsf.org/blogs/community/hexen-and-heretic . 10 September 2008 . 8 September 2008 . live.
  307. Web site: Hexen 2 source released . . . 10 April 2020 . https://web.archive.org/web/20061205145209/http://archive.gamespy.com/news/november00/hexen2/ . 5 December 2006 . dead.
  308. https://www.rockpapershotgun.com/2014/03/25/lemma-follows-in-the-footsteps-of-bastion-mirrors-edge/ lemma-follows-in-the-footsteps-of-bastion-mirrors-edge
  309. https://www.kickstarter.com/projects/et1337/lemma-first-person-parkour?ref=card lemma-first-person-parkour
  310. https://web.archive.org/web/20150212075132/http://lemmagame.com/buy/ lemmagame.com
  311. https://github.com/etodd/Lemma Lemma
  312. Web site: Gourevich . Gwenaëlle . Devlog#2: This week we are releasing… . [2.21] . 28 October 2021 . https://archive.today/20211028121222/https://blog.2point21.com/p/devlog-releasing-lba-open-source . 28 October 2021 . 27 October 2021 . live.
  313. https://www.gamingonlinux.com/2020/10/classic-3d-rts-machines-wired-for-war-goes-open-source-under-the-gpl classic-3d-rts-machines-wired-for-war-goes-open-source-under-the-gpl
  314. https://github.com/NightDive-Studio/machines machines
  315. https://lordovervolt.com/machines Machines - play one of the first 3D RTS ever
  316. http://www.nooskewl.com/content/official-license-post official-license-post
  317. https://archive.today/20131008221700/http://www.nooskewl.com/content/monster-rpg-2-now-free-and-open-source Monster RPG 2 Now Free and Open Source
  318. https://www.gamingonlinux.com/articles/monster-rpg-2-to-go-non-free-after-succesfully-crowdfunding-to-become-open-source-updated.2624/ Monster RPG 2 To Go Non-Free After Successfully Crowdfunding To Become Open Source UPDATED
  319. Web site: Building With Someone Else's Blocks: Going Open Source With Games . Michael . Thomsen . . 2 . 2011-08-24 . 2013-10-25 . [...] the game struggled to attract subscribers and was canceled after its first year. Disappointed with the turn of events, Cyan decided to release Myst Online: Uru Live as an open source game in 2010 hoping fans would be able to give the game a new life. . live . https://web.archive.org/web/20131029192734/http://www.gamasutra.com/view/feature/134835/building_with_someone_elses_.php?page=2 . 2013-10-29.
  320. Web site: unknownworlds / NS . GitHub . EXCLUDED CODE: The code described below and contained in the Natural Selection Source Code release is not part of the Program covered by the GPL and is expressly excluded from its terms. . live . https://web.archive.org/web/20150719061125/https://github.com/unknownworlds/NS/ . 2015-07-19.
  321. http://www.polygon.com/2014/1/23/5337220/natural-selection-dev-releases-games-source-code Unknown Worlds unleashes Natural Selection source code
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  323. Web site: No One Lives Forever Source Code Release . https://web.archive.org/web/20020217233624/http://pc.ign.com/articles/095/095995p1.html . dead . February 17, 2002 . October 24, 2010 . . IGN staff . June 21, 2001.
  324. NOLF Team (nolfteam@lith.com) plan file. Monolith Productions. June 20, 2001. Archived at: Web site: .plan File for NOLF Team . October 24, 2010 . Blue's News.
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  326. https://github.com/jsj2008/lithtech lithtech
  327. http://freegamer.blogspot.de/2011/07/nolf2-source-released-but-to-what-end.html nolf2-source-released-but-to-what-end
  328. http://www.gamershell.com/news_7095.html Sierra has released the No One Lives Forever 2 Toolkit
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  330. http://www.gamasutra.com/view/news/265823/Get_a_window_into_classic_Mac_dev_with_Glider_source_code.php Get a window into classic Mac dev with Glider source code
  331. Web site: Sources to Pararena, the commercial Macintosh game by John Calhoun, published by Casady & Greene, Inc. . . 2016-01-29 . Calhoun . John . live . https://web.archive.org/web/20160721130343/https://github.com/softdorothy/pararena_2 . 2016-07-21.
  332. http://www.paradoxplaza.com/index.php?option=com_content&task=view&id=144&Itemid=129 Paradox Interactive – Penumbra: Overture premieres game on Gamer's Gate
  333. Web site: Penumbra: Overture Game And Engine Source Code Released For Free . 2010-05-14 . MegaGames . 2013-10-11 . live . https://web.archive.org/web/20120423235447/http://www.megagames.com/news/penumbra-overture-game-and-engine-source-code-released-free . 2012-04-23.
  334. https://github.com/jmarshall23/Quake4Doom Quake4Doom
  335. https://github.com/skynettx/dosraptor DOS Raptor
  336. Godbolt . Matt . mattgodbolt . 1574481528356311040 . 26 September 2022 . Chuffed to say the wonderful [Jez San] has OK'd the open sourcing of Dreamcast game Red Dog! An absolute joy to work on, this was my first significant professional game code. Such great memories! - go have a laugh! . 26 September 2022 . live . https://web.archive.org/web/20220926224818/https://twitter.com/mattgodbolt/status/1574481528356311040 . 26 September 2022.
  337. Web site: O'Connor . Alice . Leahy . Brian . Source Code Released for Wolfenstein: Enemy Territory and Return to Castle Wolfenstein . . . 1 May 2020 . https://web.archive.org/web/20110918055739/http://www.shacknews.com/article/65118/source-code-released-for-wolfenstein . 18 September 2011 . 13 August 2010 . live.
  338. Web site: Wolfenstein ET and RtCW Source Released. Gamespy Planet Quake. IGN. https://web.archive.org/web/20110929171109/http://planetquake.gamespy.com/fullstory.php?id=163173 . September 29, 2011.
  339. Web site: Revenge of the Source Code . Puppy Games . 2011-04-20 . 2011-08-23 . live . https://web.archive.org/web/20110831153703/http://www.puppygames.net/blog/?p=914 . 2011-08-31. "We used the same license as found in the LWJGL."
  340. Web site: Siegler . Joe . Rise of the Source Code . . 1 May 2020 . https://web.archive.org/web/20060325005404/http://www.3drealms.com/news/2002/12/rise_of_the_sou.html . 25 March 2006 . 20 December 2002 . live.
  341. https://www.phoronix.com/scan.php?page=news_item&px=Serious-Engine-Open-Source Croteam Open-Sources The Serious Engine
  342. Web site: Serious Sam's Serious Engine source code release . 2016-03-11 . Croteam . 2016-03-12 . live . https://web.archive.org/web/20160312014114/http://www.croteam.com/serious-sam-source-code-released/ . 2016-03-12.
  343. https://www.golem.de/9811/2181.html Source Code von "Shogo: MAD" freigegeben!
  344. https://github.com/Katana-Steel/lithtech Katana-Steel/lithtech
  345. Web site: Going Open Source! . In order to give the Siege game an extended practical life, allow ongoing player support, give the game a chance to be made available on other platforms, and to share our technical learning experience with the game development community, the Board of Directors at Digital Tome LP have agreed to release the Delphi source to the Siege game to the Open Source community under an LGPL license! . 2003-06-23 . 2011-08-02 . soaos.sourceforge.net . live . https://web.archive.org/web/20110724080654/http://soaos.sourceforge.net/news/NewsPage.shtml . 2011-07-24.
  346. Web site: https://web.archive.org/web/20160929020735/http://www.blackflystudios.com/Siege.html. 2016-09-29. Siege. I am currently engaged in discussions to re-release Siege of Avalon. Stay tuned.. 2014-08-29. dead.
  347. http://soamigos.de/wbb4/index.php/Thread/4458-Siege-exe-aus-Source-Code-Delphi-4/?postID=91543#post91543 Siege-exe-aus-Source-Code-Delphi
  348. https://web.archive.org/web/20010127183100/http://www.soulride.com/products/news.html news
  349. http://games.slashdot.org/story/03/02/12/1735246/snowboarding-soul-ride-engine-goes-gpl snowboarding-soul-ride-engine-goes-gpl
  350. http://www.soulride.com/products/news.html 20 Jan 2003 - Soul Ride Engine goes GPL
  351. Web site: Double Fine™ - Action Forums. www.doublefine.com . https://web.archive.org/web/20151222102512/http://www.doublefine.com/forums/viewthread/15918/ . 2015-12-22.
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  353. Web site: Fans Keep Working On Cancelled Strategy Game . Luke . Plunkett . 2015-10-06 . 2015-10-06 . Kotaku . live . https://web.archive.org/web/20151007204353/http://kotaku.com/fans-keep-working-on-cancelled-strategy-game-1735075779 . 2015-10-07.
  354. https://github.com/id-Software/Wolf3D-iOS/blob/master/wolf3d/readme_iWolf.txt readme_iWolf.txt
  355. Polyacov . Ivan . AstralHeroes . 1235293735166058497 . 4 March 2020 . Apus Game Engine is now published at GitHub under BSD license . no . 15 November 2020 . https://web.archive.org/web/20201116023653/https://twitter.com/AstralHeroes/status/1235293735166058497 . 16 November 2020 . live.
  356. Web site: Polyacov . Ivan . Source code of the Astral Towers game . subscription . . 30 September 2020 . As promised, here is the source code of the Astral Towers game recently published on Steam. It can be compiled with Delphi Community Edition..
  357. Web site: Polyacov . Ivan . Astral Towers game for Linux - source code . subscription . . 19 March 2021.
  358. https://github.com/TheJare/SpeedHasteSrc Speed Haste Game Source Code
  359. Web site: Lucasarts' Closure Convinces Developers To Release Awesome Star Wars Source Code . In the wake of Lucasarts' closure today, Raven - the developers of the thoroughly excellent Jedi Outcast - have decided to release the source code for the game. Oh, and the code for its sequel, Jedi Academy, as well. . Kotaku . Luke . Plunkett . 2013-04-03 . 2013-04-04 . live . https://web.archive.org/web/20130407092557/http://kotaku.com/lucasarts-closure-convinces-developers-to-release-awes-468994505 . 2013-04-07.
  360. https://github.com/NightDiveStudios/shockmac shockmac
  361. https://www.reddit.com/r/IAmA/comments/4pbc01/iama_founder_of_night_dive_studios_stephen_kick/d4jl1n7 IamA Founder of Night Dive Studios, Stephen Kick - We track down and restore classic video games! AMA!
  362. https://www.systemshock.org/index.php?topic=8402 System Shock Remake Feedback Request - Night Dive Studios
  363. https://www.reddit.com/r/gamedev/comments/8a4udu/system_shock_source_code_released_under_gpl/ system_shock_source_code_released_under_gpl
  364. Web site: 'Shockolate' Is A Cross-Platform System Shock Built On The Original, Open-Sourced Code . Logan . Booker . 2018-06-16 . Kotaku.
  365. Web site: 弊社製品のムービー再生にxvid.orgのムービー展開ライブラリを使用していた件について。. Announcement Concerning Our Company's Use of Xvid.org's Video Codec Library for Video Playback in Products . . 2005-12-22 . Japanese . 2010-12-18 . https://web.archive.org/web/20061126174514/http://leaf.aquaplus.co.jp/product/xvid.html . 2006-11-26.
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  367. https://github.com/jeeb/aquaplus-sources aquaplus-sources
  368. https://github.com/catmirrors/xlvns xlvns
  369. http://www.phoronix.com/scan.php?page=news_item&px=MTU2Mzg MKXP: Open-Source, Linux Engine To RPG Maker XP
  370. https://github.com/OutOfOrder/mkxp-ToTheMoon mkxp-ToTheMoon
  371. https://pyra-handheld.com/boards/threads/ptitsebs-beta-lair.77439/ ptitSeb's Beta Lair
  372. https://github.com/Ancurio/mkxp-abs mkxp-abs
  373. Web site: Two Tribes' Game Engine is Now Open Source! . Games Press . 23 December 2021 . https://web.archive.org/web/20211223014358/https://www.gamespress.com/en-AU/Two-Tribes-Game-Engine-is-Now-Open-Source . 23 December 2021 . 17 December 2021 . live.
  374. https://github.com/dizzy2003/MuckyFoot-UrbanChaos UrbanChaos
  375. https://github.com/KranX/Vangers Vangers
  376. Web site: badman . Wolfenstein: Enemy Territory Goes Open Source . . 1 May 2020 . https://web.archive.org/web/20100816051454/http://www.splashdamage.com/content/wolfenstein-enemy-territory-goes-open-source . 16 August 2010 . 13 August 2010 . live.
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  378. https://www.gamasutra.com/view/news/312205/Ubisoft_releases_opensource_code_for_World_in_Conflict_servers.php Ubisoft_releases_opensource_code_for_World_in_Conflict_servers
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  381. http://www.neurohack.com/downloads/DOSAnacreonSource20.zip DOSAnacreonSource20.zip
  382. Web site: Beneath a Steel Sky. 2017-10-04 . https://web.archive.org/web/20160703131602/http://www.classicdosgames.com/game/Beneath_a_Steel_Sky.html. classicdosgames.com. 2016-07-03 . "Source code for Beneath a Steel Sky in Assembly language (415,225 bytes) xxxx". 2005.
  383. Web site: Latest Developments . . August 2, 2012 . July 14, 2013 . Support for Beneath a Steel Sky, made possible thanks to Revolution Software supplying us with the original assembly source code! . live . https://web.archive.org/web/20130822035506/http://scummvm.org/news/20030802/ . August 22, 2013.
  384. Web site: The Beyond Castle Wolfenstein Project – Beyond Castle Wolfenstein Project Quick FAQ . Q) Do you have the rights to distribute this game? A) Hopefully! Silas Warner's wife has granted permission to release the source code and game executables as a small memorial of his work. . oldskool.org . Jeff . Leyda . 2014-08-31 . live . https://web.archive.org/web/20140907221337/http://www.oldskool.org/pc/BCW/faq.html . 2014-09-07.
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  388. http://www.afterprotocol.com/ afterprotocol.com
  389. https://github.com/bobsgame/bobsgame bobsgame
  390. http://www.caltrops.com/pointy.php?action=viewPost&pid=180522 Bob's Game source code released!
  391. https://app.assembla.com/spaces/carnivores_2/subversion/source/HEAD carnivores_2
  392. http://www.moddb.com/games/carnivores-2/downloads/carnivores-2ice-age-source-code carnivores-2ice-age-source-code
  393. http://pdroms.de/nintendoentertainmentsystem/crystal-mines-source-code-nes-game Crystal Mines (Source Code) (NES Game)
  394. http://forums.nesdev.com/viewtopic.php?t=8057 Post subject: Crystal Mines Source Code Released
  395. http://gilgalad.arc-nova.org/vgscr/nes/Crystal%20Mines%20(NES)%2011151989%20Version.zip Crystal%20Mines%20(NES)%2011151989%20Version.zip
  396. http://www.digger.org/digsrc_orig.zip digsrc_orig.zip
  397. http://www.digger.org/whatsnew.html whatsnew.html
  398. http://www.digger.org/download.html download
  399. https://web.archive.org/web/20100911232420/http://frodpod.tripod.com/lisence.html Grant of license to reproduce Dungeons of Daggorath
  400. Web site: A Review of DynaMicro's The Dungeons of Daggorath (1982) . "Programmers and coders may also be interested in the source code should email Louis Jordan. Before doing so, check out the License Grant offered by Doug Morgan, former president of Dyna Micro. Apparently he's willing to give the code to anyone willing to cover the costs of shipping and copying (at Kinko's) the listing." . 13 October 2006 . Matt . Barton . Armchair Arcade . live . https://web.archive.org/web/20100911041306/http://www.armchairarcade.com/neo/node/900 . 11 September 2010.
  401. https://web.archive.org/web/20020901022101/http://mspencer.net/daggorath/dodpcp.html Project Page for Dungeons of Daggorath PC-Port
  402. http://hd.servebbs.org/dod/ DoD for Linux 0.51
  403. http://riscos.blog.com/2012/06/02/games-corner-dungeons-of-daggorath-port-released/
  404. http://www.qj.net/psp/homebrew-games/psp-homebrew-dungeons-of-daggorath-v07.html psp-homebrew-dungeons-of-daggorath
  405. Web site: The End of an Era! . https://web.archive.org/web/20051124230517/http://www.enemynations.com/. October 1, 2005: We just sold the last copy of Enemy Nations. [...] If you have a copy and want to give a copy to a friend - you have our permission to burn a CD with a copy of Enemy Nations - with one major caveat. You must give them the game. You cannot sell it to them. You cannot include it as part of anything you sell. It cannot be included with any product or magazine as a free extra. The person making the copy must even buy the blank CD. It must be a true free gift given totally separate of anything else. . Windward . 2005-10-01 . 2005-11-24 . 2013-10-26.
  406. http://www.atomicgamer.com/files/38290/enemynationssource-rar source code mirror
  407. http://digitalweird.blogspot.de/2006/01/get-your-very-own-free-and-legal-copy.html get-your-very-own-free-and-legal-copy
  408. Web site: License for Original Code . This is released under a limited license: 1) No rights are given to the game Enemy Nations, the trademark Enemy Nations, or the concept. 2) Windward intends to someday create an Enemy Nations II and reserves all rights for all future versions of the game. 3) You may not sell anything derived from this code, art, or anything else included. 4) This is released solely for people to learn from the code and to make fixes in the existing code that they will make available for free. If you don't like these restrictions, don't use this code/data. . launchpad.net/enations . live . https://web.archive.org/web/20170213090824/https://launchpad.net/enations/%2Bannouncement/2080 . 2017-02-13.
  409. http://www.igorlabs.com/classic-games IgorLabs classic games page
  410. https://github.com/heyigor/FortApocalypse FortApocalypse
  411. http://www.iancgbell.clara.net/freefall/index.htm Free Fall
  412. http://www.thatgamecompany.com/forum/viewtopic.php?t=993 You can get it here.
  413. http://www.jenovachen.com/flowingames/implementations/flowing/flOw_source.zip flOw.source.zip
  414. https://raw.github.com/HoverRace/HoverRace/master/license.txt GrokkSoft HoverRace SourceCode License v1.0, November 29, 2008
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  418. http://www.redshadowsoftware.com/projects/greed greed
  419. https://forums.duke4.net/topic/7845-in-pursuit-of-greed/page__view__findpost__p__213594 in-pursuit-of-greed
  420. http://www.classicdosgames.com/files/licenses/Kiloblaster_and_Xargon_Freeware_License.txt Kiloblaster_and_Xargon_Freeware_License
  421. http://www.classicdosgames.com/game/Kiloblaster.html Kiloblaster
  422. https://pyra-handheld.com/boards/threads/xargon.76262/page-2#post-1370084 Xargon
  423. http://dscho.com/fruit/ Amiga Games
  424. http://amigagamer.blogspot.de/2012/11/kumquat-cantaloupe-full-games-and-source.html Kumquat & Cantaloupe - Full Games and Source
  425. https://github.com/cxong/MagusPreservation MagusPreservation
  426. https://github.com/cxong/RonnysMagus RonnyMagus
  427. https://web.archive.org/web/20000408233401/http://www.orcsoftware.com/~ronny/Cyberdogs.html Cyberdogs
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  429. http://pc.ign.com/articles/135/135129p1.html roboforge
  430. http://www.roboforge.altervista.org/source.htm source
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  433. Web site: linuX-gamers.net - Savage: The Battle for Newerth now Freeware . linux-Gamers. 2008-11-02 . https://web.archive.org/web/20080608113437/http://www.linux-gamers.net/modules/news/article.php?storyid=1779 . June 8, 2008.
  434. https://pyra-handheld.com/boards/attachments/savage1-source-zip.30052/ savage1-source-zip
  435. http://www.newerth.com/?id=about Newerth Savage XR - About us
  436. Web site: Games by Wayne Westmoreland and Terry Gilman.
  437. http://commodore.ninja/three-atari-8-bit-games-source-code-have-been-released/ Three Atari 8-bit games source code have been released
  438. http://www.mobygames.com/game/stellar-conquest-3-hostile-takeover stellar-conquest-3-hostile-takeover
  439. http://necrobones.com/games/games1.shtml NecroBones DOS Shareware/Freeware Games & Demos
  440. https://web.archive.org/web/20131014172305/http://stellarfrontier.net/sf12source.rar stellar_frontier_source_eula.txt
  441. Web site: Stellar Frontier Source Code – Released . https://web.archive.org/web/20091231141227/http://stellarfrontier.ss-network.net/index.php/topic%2C82.0.html . December 31, 2009 . As of Tuesday, November 18, 2008, the Stellar Frontier source code has officially been released by Stardock Corporation. End-User License Agreement was updated June 19th 2010. . 2008-11-18 . 2013-10-13 . stellarfrontier.ss-network.net . dead.
  442. http://nexus.stellarfrontier.net/devlog.php Stellar Frontier Development Log
  443. http://ifdb.tads.org/viewgame?id=8upuvdnsk4sho6ac Treasures of a Slaver's Kingdom
  444. http://ifdb.tads.org/search?searchfor=tag:C%20source%20available tag:C source available
  445. https://web.archive.org/web/20091008001434/http://www.gamersgate.com/DD-WTR/world-train-royale world-train-royale
  446. http://versus-software.com/blog/world-train-royale-is-free-as-in-beer-and-speech/ world-train-royale-is-free-as-in-beer-and-speech
  447. http://sourceforge.net/projects/trainroyale/ trainroyale
  448. http://www.classicdosgames.com/game/Xargon.html Allen Pilgrim declared Xargon freeware and released the source code.
  449. https://github.com/Malvineous/xargon xargon
  450. Web site: Ashley . Dave . Thrillride pinball added. . . 13 May 2020 . https://web.archive.org/web/20200513212717/https://github.com/dashxdr/cgb/commit/141715f5a88d75220635d92e356cb29ee0aa3eb7 . 13 May 2020 . 13 May 2020 . live.
  451. http://www.airline-tycoon.com/viewtopic.php?f=53&t=3531 license.txt
  452. Web site: Release: Airline Tycoon Deluxe . 2015-03-24 . 2015-08-01 . Airline Tycoon Deluxe is a golden oldie with native versions for Mac OS X and Linux. As an added bonus, the package here comes with the game's Windows source code for your viewing and tweaking pleasure. You sure don't see that every day. . gog.com . gog.com team . live . https://web.archive.org/web/20150809223259/http://www.gog.com/news/release_bairline_tycoon_deluxeb . 2015-08-09.
  453. Web site: García . Paulo . Commodore 64 developer of Altered Beast, Rampage, Atomic Robokid releases source code after 30+ years! . Vintage is the New Old . 27 June 2020 . https://web.archive.org/web/20200215030703/https://vintageisthenewold.com/commodore-64-developer-of-altered-beast-rampage-atomic-robokid-releases-source-code-after-30-years/ . 15 February 2020 . 20 May 2019 . live.
  454. https://web.archive.org/web/20160610175317/http://girv.net/blog/2009/alien-breed-3d.html Alien Breed 3D
  455. http://www.successdenied.com/2010/12/alien-breed-3d-ii-quellcode/ alien-breed-3d-ii-quellcode
  456. http://aminet.net/search?query=a3dsrc a3dsrc
  457. Web site: Smith. Jason. Jaguar Sector II Atari Jaguar Software Price and Rarity Guide. jaysmith2000.com. 2018-09-10. https://web.archive.org/web/20131117222232/http://www.jaysmith2000.com/Jagpriceguide.htm. 17 November 2013. dead.
  458. Web site: Smith. Jason. Atari Jaguar Timeline. jaguarsector.com. 2018-09-09. https://archive.today/20130629025431/http://www.jaguarsector.com/index.php?autocom=ibwiki&cmd=article&do=print_article&id=379. 2013-06-29. dead.
  459. Atari Jaguar Source Code Collection (REVIEW) - JaguarSector.com. YouTube. October 12, 2008. viMasterJag. 2018-09-10. A31Chris: These are actually all Curts stuff that he shared with JaySmith to support for about a year. This stuff should all be available to everyone now. Atarimuseum.com.
  460. http://subversion.assembla.com/svn/AvP/trunk/License.txt AvP/trunk/License.txt
  461. http://homepage.eircom.net/~duncandsl/avp/ Aliens Vs Predator - Source code update
  462. https://grenouillebouillie.wordpress.com/2013/01/18/is-it-worth-disputing-the-title-of-first-3d-game-on-a-pc-to-john-carmack/ is-it-worth-disputing-the-title-of-first-3d-game-on-a-pc-to-john-carmack
  463. Web site: Alpha - Waves version 1.0 . 2006-12-02 . dead . https://web.archive.org/web/20090505172427/http://cc3d.free.fr/cube.s . 2009-05-05. Alpha Waves source code for Atari ST
  464. http://cc3d.free.fr/Alpha-Waves.zip cc3d.free.fr/Alpha-Waves.zip
  465. https://grenouillebouillie.wordpress.com/2007/11/09/the-dawn-of-3d-games/#comment-169 the-dawn-of-3d-games
  466. https://sourceforge.net/projects/alpha-waves/ alpha-waves
  467. han_tani . 1246441140062023686 . Han-Tani . Melos . I just open-sourced our surreal Zelda-like, Anodyne!! The code, art, and music are now free to be used for mods, fan games, sprite webcomics, AMVs, etc! I also included the level editor. Check it out here and make something cool!! . 4 April 2020 . yes . 9 April 2020 . https://archive.today/20200409201241/https://twitter.com/han_tani/status/1246441140062023686 . 9 April 2020 . live.
  468. Web site: Kerr . Chris . Analgesic has open-sourced its 'Zelda-like' adventure game Anodyne . . . 9 April 2020 . https://web.archive.org/web/20200409201855/https://www.gamasutra.com/view/news/360734/Analgesic_has_opensourced_its_Zeldalike_adventure_game_Anodyne.php . 9 April 2020 . 6 April 2020 . live.
  469. ArmyMenThree . 990986131503288321 . 30 April 2018 . Army Men III now open-source! . no.
  470. http://www.retrocollect.com/News/jeff-minters-unreleased-konix-multisystem-port-of-attack-of-the-mutant-camels-preserved-a-due-for-release.html jeff-minters-unreleased-konix-multisystem-port-of-attack-of-the-mutant-camels-preserved-a-due-for-release
  471. https://github.com/SavourySnaX/AOTMC89 AOTMC89
  472. http://amanita-design.net/blog/2011/01/07/aztaka-developers-edition/ Aztaka Developer's Edition
  473. http://www.gamershell.com/news_108978.html Aztaka Developer's Edition Released
  474. http://atariage.com/forums/topic/215949-request-for-assistance-in-publishing-old-source-code-files/ Request for assistance in publishing old source code files
  475. Web site: Source Code . 30 months ago, at the 2011 Game Developers Conference, somebody asked me to release the source code for my old games. I said I would look into it. [...] I have begun the process of preparing my source code for general distribution. . 2017-02-24 . 2013 . Chris . Crawford . live . https://web.archive.org/web/20161219155140/http://www.erasmatazz.com/library/source-code/index.html . 2016-12-19.
  476. Web site: 2015-03-27 . Chris . Shrigley . batman-returns-sega-cd-3d-driving-game-source-code found . shrigley.com . 2015-11-20 . live . https://web.archive.org/web/20151121041129/http://shrigley.com/batman-returns-sega-cd-3d-driving-game-source-code/ . 2015-11-21.
  477. http://shrigley.com/source_code_archive/ source code archive
  478. Web site: Ashley . Dave . Added Beuaty And The Beast: A Boardgame Adventure . . 13 May 2020 . https://web.archive.org/web/20200513212942/https://github.com/dashxdr/cgb/commit/6b1311d0f4cf52d15cccce228a9b94109e9d9c58 . 13 May 2020 . 13 May 2020 . live.
  479. Web site: Blood 2 Modifications (Source Code & Tools!) . https://web.archive.org/web/20000831084413/http://www.the-chosen.com/mods/ . 2000-08-31 . 1999 . 2013-11-13 . Monolith Productions.
  480. http://atariage.com/forums/topic/249933-blue-max-source-code-for-you/ Blue Max source code for you.
  481. http://atariage.com/forums/topic/258786-phoenix-software-source-code/ phoenix-software-source-code
  482. http://atariage.com/forums/topic/257991-atari-pilot-source-code/ atari-pilot-source-code
  483. http://atariage.com/forums/topic/144322-source-code-pole-position/ source-code-pole-position
  484. Web site: ener . The big Zero Six Zero . 20 July 2020 . https://web.archive.org/web/20100612212626/http://scummvm.org/news/20040316/ . 12 June 2010 . 16 March 2004 . [...] We have also added new support for the following games: Broken Sword 1 and Broken Sword 2. Many thanks to Revolution for providing us with the source-code to these games.. live.
  485. http://apolyton.net/content.php/318-Call-to-Power-II-Source-Code-End-User-License-Agreement Call-to-Power-II-Source-Code-End-User-License-Agreement
  486. Web site: Opening the Source of Art . 2009-10-01 . John . Bell . [...]that no further patches to the title would be forthcoming. The community was predictably upset. Instead of giving up on the game, users decided that if Activision wasn't going to fix the bugs, they would. They wanted to save the game by getting Activision to open the source so it could be kept alive beyond the point where Activision lost interest. With some help from members of the development team that were active on fan forums, they were eventually able to convince Activision to release Call to Power II's source code in October of 2003. . Technology Innovation Management Review . 2012-12-30 . dead . https://web.archive.org/web/20140330084636/http://timreview.ca/article/294 . 2014-03-30.
  487. http://www.gamasutra.com/view/news/99858/Product_2K_Games_Firaxis_Release_Civ_IV_SDK.php Product_2K_Games_Firaxis_Release_Civ_IV_SDK
  488. http://www.2kgames.com/civ4/downloads.htm civ4 downloads
  489. Web site: GameSpy: Civilization IV . Kosak . Dave 'Fargo' . 27 October 2005 . . 1–3 . 662218 . https://web.archive.org/web/20131206061753/http://pc.gamespy.com/pc/civilization-iv/662218p1.html . 6 December 2013 . dead . 24 October 2009.
  490. https://sourceforge.net/projects/civ4betterai/ Civ4: Better AI
  491. https://forums.civfanatics.com/threads/civilization-v-dll-source-code-coming-with-fall-patch.476593/ civilization-v-dll-source-code-coming-with-fall-patch
  492. News: Wondrous: The Civilization V Community Patch Project. 2016-04-26. there's another big new release expected, but it's not an official expansion. It's the Community Patch Project (CPP; to be named Vox Populi on release), a community-made mod that overhauls and improves a majority of the game's systems in an attempt to make Civilization V the best game it possibly can be. . Samuel . Wicks . Rock Paper Shotgun.
  493. The Modders Who Decided to Overhaul the AI in 'Civilization V' . Patrick . Klepek . Community Patch was actually built upon another mod. Since development began in 2014, it's become its own thing, prompting a rebranding: Vox Populi. Besides improving upon the game's AI, Vox Populi tweaks the game's balance, and fixes bugs that were left behind after Firaxis moved on. [...]we have to respect them for giving us the source code, and that must have taken some courage. 2017-04-26 . Vice.com.
  494. Web site: Classic Gem Promo: Conquest: Frontier Wars . 2013-12-09 . . . live . https://web.archive.org/web/20140612011259/http://www.gog.com/forum/general/classic_gem_promo_conquest_frontier_wars_copy3 . 2014-06-12.
  495. https://robertsspaceindustries.com/comm-link/spectrum-dispatch/12863-Conquest-Frontier-Wars-On-GOG Conquest: Frontier Wars on GOG
  496. Web site: Hillier. Brenna. GameMaker's Humble Bundle has some great games – and the tools to make your own . VG247. 8 September 2018. https://web.archive.org/web/20180908012952/https://www.vg247.com/2016/09/07/gamemakers-humble-bundle-has-some-great-games-and-the-tools-to-make-your-own/. 8 September 2018. 7 September 2016. ...Uncanny Valley; Cook, Serve, Delicious; Ink, Shep Hard, and Angry Chicken: Egg Madness [...] Extreme Burger Defense, Freeway Mutant [...] Galactic Missile Defense, Solstice, and Home [...] 10 Second Ninja X GameMaker Edition [...] Flop Rocket.. live.
  497. Donnelly . Joe . GameMaker's Humble Bundle offers big savings on development tools . . . 29 April 2020 . https://web.archive.org/web/20160908164251/http://www.pcgamer.com/gamemakers-humble-bundle-offers-big-savings-on-development-tools/ . 8 September 2016 . 7 September 2016 . live.
  498. Web site: Williatham . Atle . Humble GameMaker Bundle brings $1885 worth of game dev content for $15 . GameZone . 29 April 2020 . https://web.archive.org/web/20160908194305/http://www.gamezone.com/news/humble-gamemaker-bundle-brings-1885-worth-of-game-dev-content-for-15-3443276 . 8 September 2016 . 7 September 2016 . live.
  499. Edwards. Kevin. KevEdwardsRetro. 1059562559123218432. 5 November 2018. I have just released the 6502 source code for my BBC Micro game, Crazee Rider, from 1987.. no. 27 December 2019. https://archive.today/20181106092924/https://twitter.com/KevEdwardsRetro/status/1059562559123218432. 6 November 2018. live.
  500. Edwards. Kevin. KevEdwardsRetro. 1113205022274330625. 2 April 2019. I have been on Twitter for almost one year now. To mark this anniversary I have decided to release the full Acorn Electron source code for Crazee Rider from 1987. You can find the fully buildable 6502 source code on GitHub. I hope you find it of interest.. no. 27 December 2019. https://archive.today/20200429172233/https://twitter.com/KevEdwardsRetro/status/1113205022274330625. 29 April 2020. live.
  501. Web site: http://www.crytek.com/news/news/?tx_ttnews[pointer=17&tx_ttnews[tt_news]=76&tx_ttnews[backPid]=9&cHash=e4dea47a80 Crytek GmbH: Crytek announces its Game Engine CryENGINE ]. https://web.archive.org/web/20081115062536/http://www.crytek.com/news/news/?tx_ttnews%5Bpointer%5D=17&tx_ttnews%5Btt_news%5D=76&tx_ttnews%5BbackPid%5D=9&cHash=e4dea47a80 . dead . 2008-11-15 . . 2008-11-15 . 2016-10-30.
  502. Web site: Schreier. Jason. Jason Schreier. 15 March 2016. Crytek's Video Game Engine Is Now Free. 5 October 2021. Kotaku. https://web.archive.org/web/20160510122147/http://kotaku.com/cryteks-video-game-engine-is-now-free-1765078659. 10 May 2016.
  503. http://www.pcgamer.com/cryengine-v-releases-today-on-a-pay-what-you-want-basis/ CryEngine V releases today on a pay-what-you-want basis
  504. . 2015-01-20 . "Devs Play" S01E05 - Doom (Part 8 - Map 6 Central Processing) 60fps [8/10] . 2015-12-12 . 5:56 . . YouTube . live . https://web.archive.org/web/20160317033205/https://www.youtube.com/watch?v=9gs5r_4eY0k&t=356 . 2016-03-17.
  505. https://bitbucket.org/daikatana13/daikatana/src daikatana 1.3
  506. Palestar. "Medusa Engine License", retrieved January 22, 2010.
  507. Drafell. "Medusa Engine Source Code Released", DarkSpace Development Blog, June 21, 2009. (Accessed Jan 22 2010)
  508. https://github.com/oakwarrior/DeathAndTaxes oakwarrior/DeathAndTaxes
  509. https://www.gamingonlinux.com/articles/death-and-taxes-goes-open-source-after-selling-pretty-well-to-help-others.16250 Death and Taxes goes open source after selling 'pretty well' to help others
  510. https://techraptor.net/gaming/reviews/death-and-taxes Death and Taxes
  511. https://www.rockpapershotgun.com/2015/09/18/death-ray-manta-steam/#more-315465 death-ray-manta-steam
  512. http://blackworldforum.com/showthread.php?tid=6244 (GET) DEATH RAY MANTA - Game Maker Studio source
  513. Web site: Descent-2/README.TXT at master · OpenSourcedGames/Descent-2 . . 2014-09-09 . live . https://web.archive.org/web/20151025225940/https://github.com/OpenSourcedGames/Descent-2/blob/master/README.TXT . 2015-10-25.
  514. Web site: Descent Source Code Released . 1998-01-26 . Alan . Dunkin . 2013-01-13 . gamespot.com . Parallax Software, the software developer that created the popular three-dimensional action games Descent and Descent II, has released Descent's source code (version 1.5) to the public domain for noncommercial purposes..
  515. News: Descent 3 – Past Headlines – 1999 . Outrage Entertainment . 2007-02-07 . https://web.archive.org/web/20070203072628/http://www.descent3.com/0b_headlines_1999.html . 2007-02-03.
  516. https://www.facebook.com/OldeSkuul/posts/702537709789795?comment_id=6792789 OldeSkuul
  517. https://www.adventure-treff.de/forum/viewtopic.php?f=1&t=7690&p=145582&hilit=source+code#p145582 Freeware releases
  518. http://www.jameswoodcock.co.uk/2008/05/29/discworld-source-code-retrieved-scummvm-developers-thrilled-and-already-coding/ Discworld Source Code Retrieved – ScummVM Developers Thrilled and Already Coding
  519. http://onlyagame.typepad.com/only_a_game/2008/07/discworld-revisited.html discworld-revisited
  520. https://gamehistory.org/aladdin-source-code/ Digging for treasure in Aladdin's source code
  521. http://www.vintageisthenewold.com/source-code-of-ataris-game-dog-daze-available-on-internet-archive/ source-code-of-ataris-game-dog-daze-available-on-internet-archive
  522. Web site: Yarusso . Albert . Jaguar DOOM Source Code Released! . . 28 March 2020 . https://web.archive.org/web/20130614190006/http://atariage.com/forums/topic/25350-jaguar-doom-source-code-released/ . 14 June 2013 . 27 April 2003 . live.
  523. Web site: Siegler . Joe . Duke Nukem 3D Source Code Released . . 1 May 2020 . https://web.archive.org/web/20051201091513/http://www.3drealms.com/news/2003/04/duke_nukem_3d_s_4.html . 1 December 2005 . 1 April 2003 . live.
  524. http://www.eduke32.com/ eduke32.com
  525. https://indiegamereviewer.com/trendy-entertainment-offers-complete-dungeon-defenders-dev-kit-and-source-code-as-free-dlc/ Trendy Entertainment Offers Complete Dungeon Defenders Dev Kit And Source Code As Free DLC
  526. http://www.sslmit.unibo.it/zat/frontier.htm Ian Bell's Elite pages - November 1999 : Elite 15th Anniversary - Released the program sources
  527. Web site: https://web.archive.org/web/20001118113900/http://www.iancgbell.clara.net/clara.net/i/a/n/iancgbell/webspace/elite/archive/index.htm . 2000-11-18 . Elite Archives ----The Files---- . Bell . Ian . iancgbell.clara.net . 1999-11-01 . 2015-11-06.
  528. Web site: Elite - The New Kind Darkness Falls (see also FAQ) . 2022-06-15 . Christian Pinder . en-US.
  529. Web site: 2003-04-17 . Elite - The New Kind . dead . https://web.archive.org/web/20030417164214/http://home.clara.net/cjpinder/elite.html . 2003-04-17 . 2022-06-15 . Elite - The New Kind.
  530. http://www.iancgbell.clara.net/elite/cix/index.htm David Braben's Legal Threats to the Elite Home Page
  531. Web site: Braben . David . 30 December 2012 . I am David Braben, co-creator of Elite, creator of Frontier, Frontier II and the upcoming Elite: Dangerous . live . https://web.archive.org/web/20141118131027/http://www.reddit.com/r/IAmA/comments/15od2s/i_am_david_braben_cocreator_of_elite_creator_of/ . 2014-11-18 . 30 December 2012 . Reddit AMA.
  532. Web site: Bell and Braben See Eye-to-eye as Original Elite Sees Dual Re-release . 25 September 2014 . cabume.co.uk . https://web.archive.org/web/20150413091114/http://www.cabume.co.uk/software/bell-and-braben-see-eye-to-eye-as-classic-eighties-video-game-elite-sees-dual-re-release.html . 2015-04-13.
  533. https://web.archive.org/web/20060507183030/http://eech.bollocks.net.nz/modules.php?op=modload&name=legal&file=licence&POSTNUKESID=210df27a8a1673968abb7b4ff0d2eb89 Empire Interactive (Europe) Limited Licence Agreement for Razorworks' "Enemy Engaged RAH-66 Comanche Versus KA-52 Hokum"
  534. https://web.archive.org/web/20050307043106/http://eech.bollocks.net.nz/index.php EECH DevZone
  535. Web site: Han-Tani . Melos . I open-sourced Even the Ocean (2016)! But why? . . 24 September 2023 . https://web.archive.org/web/20230924055036/https://melodicambient.substack.com/p/i-open-sourced-even-the-ocean-2016 . 24 September 2023 . 23 September 2023 . live.
  536. Schwab . Leo . 7 August 2022 . Escape from Monster Manor: A Source Code Walkthrough . Podcast . 11 August 2022 . YouTube.
  537. Web site: a-yyg . First Post . a-yyg's blog . 15 August 2021 . https://web.archive.org/web/20210815184709/https://blogs.scummvm.org/ayyg/2021/05/20/hello-world/ . 15 August 2021 . 20 May 2021 . The task I am here to work on during this GSoC is the implementation of the SAGA2 engine. [...] Another game developed by The Dreamers Guild is Faery Tale Adventure II: Halls of the Dead. Unfortunately, it seems that the SAGA engine is not appropriate for playing FTA2, so we have decided to implement its functionality into another engine. Therefore, the goal of my task is, in specific terms, to have the game playable within ScummVM as a new engine named SAGA2. Of course, we're not doing this empty handed. We have gratefully received full sources from the authors and will build from that into the SAGA2 engine. . live.
  538. Web site: James "Ender" Brown . What day is it? October the 5̶t̶h̶!̶.. Er, 12th! . . 18 September 2020 . https://web.archive.org/web/20100612213857/http://scummvm.org/news/20071012/ . 12 June 2010 . 12 October 2007 . live.
  539. Web site: Freespace Source Code . Ivan . Sulic . 2002-04-25 . 2013-01-11 . . live . https://web.archive.org/web/20121210130100/http://www.ign.com/articles/2002/04/25/freespace-source-code . 2012-12-10.
  540. Edwards. Kevin. KevEdwardsRetro. 1102319152038141955. 3 March 2019. If you'd like to see how games were programmed in 1986 then you can take a look at the complete source code for my BBC Micro game Galaforce.. no. 27 December 2019. https://archive.today/20200429173016/https://twitter.com/KevEdwardsRetro/status/1102319152038141955. 29 April 2020. live.
  541. Edwards. Kevin. KevEdwardsRetro. 1113896605969731586. 4 April 2019. The full 6502 source code for my 1986 shoot-em-up game 'Galaforce' on the Acorn Electron is now available on GitHub.. no. 27 December 2019. https://archive.today/20200429173311/https://twitter.com/KevEdwardsRetro/status/1113896605969731586. 29 April 2020. live.
  542. Web site: Gothic 3 Community Patch soll fast alle Fehler beheben – Mehr als 700 Veränderungen im letzten Community Patch . 2009-03-23 . . Andreas . Sebayang . German . 2013-01-06 . Das Team hatte Zugriff auf den Quellcode von Gothic 3. Zusätzlich wurde auch inhaltlich an dem Spiel gearbeitet, da laut Patch Team ein Beheben aller Fehler nicht allein durch das Verändern des Quellcodes möglich war. . live . https://web.archive.org/web/20130122184237/http://www.golem.de/0903/66059.html . 2013-01-22.
  543. https://archive.org/details/Grand_Monster_Slam_Source Grand Monster Slam (Source Code)
  544. http://thekoalition.com/2014/hack Double Fine Releases Source Code for Hack 'n' Slash
  545. https://www.rockpapershotgun.com/2014/09/10/hack-n-slash-released-source-code/ Hack 'n' Slash Leaves Early Access, Brings Source Code
  546. http://steamcommunity.com/app/364750/discussions/0/613957600546320579/ Hacker Evolution Source code
  547. http://sources.pigwa.net/?page=3 Atari source code archive
  548. Web site: End-user License Agreement for Relic Entertainment Inc. ("RELIC") Software . 2014-03-30 . dead . https://archive.today/20120804163454/http://www.homeworldsdl.org/LICENSE.txt . 2012-08-04.
  549. Web site: Homeworld Source Code Released . 2003-10-08 . Andy . Largent . insidemacgames.com . 2012-12-23 . dead . https://web.archive.org/web/20131012012745/http://www.insidemacgames.com/news/story.php?ArticleID=8516 . 2013-10-12.
  550. https://web.archive.org/web/20141017181452/http://homeworldsdl.org/hw.html Macintosh Homeworld
  551. Web site: Game of the Week #3 – Homeworld SDL . 2011-06-23 . pandorapress.net . 2013-04-24 . pandorapress staff . […] released port of HomeworldSDL. […] enables your Pandora to experience the excellent work done by the guys at HomeworldSDL. . https://web.archive.org/web/20110830031132/http://pandorapress.net/2011/06/23/game-of-the-week-3-homeworld-sdl/ . 2011-08-30.
  552. http://talk.maemo.org/showthread.php?t=85104 (Announce) Homeworld (updated 2012/12/03)
  553. https://www.youtube.com/watch?v=-QDN-wd0mSc Homeworld (from 1999) on Android.
  554. http://beloko.com/hw.html Homeworld to Android
  555. http://homesource.nekomimicon.net/sourceforum/viewtopic.php?f=9&t=377 Homeworld source code licence
  556. Web site: Congratulations on the purchase of Homeworld IP! Re-licensing of code requested. . BugsMenot . 2013-04-01 . gearboxsoftware.com . 2014-08-11 . [...]it was deemed pretty much impossible to continue to do anything with the released source code that was made available.[...]We just ask that the already released source code be made available under a GPL V2.0 or higher license and hosted on GitHub. . dead . https://web.archive.org/web/20150217020737/http://oldforums.gearboxsoftware.com/showthread.php?p=4010415#post4010415 . 2015-02-17.
  557. Web site: Re: HW source now? . https://archive.today/20150308155452/http://oldforums.gearboxsoftware.com/showpost.php?p=4553392&postcount=6 . dead . 2015-03-08 . BurlesonGBX . The license agreement for the original release of the source still stands.[...] If someone is interested in doing something under a different license using the old opensource code, there is always room to talk. . 2013-09-05 . 2014-08-11 . gearboxsoftware.com.
  558. Web site: Buchanan-Smith. Matt. Hover Strike Source (Tank). Facebook. May 28, 2017. 2018-09-11. Source Code for the Atari Jaguar game Hover Strike which was code named 'Tank'. There is another version of the source code floating about which is apparently for the CD version. Not seen any documentation for this but I think it's the cart version, originally from the Atari HQ CD.
  559. http://www.intuitiongames.com/2010/10/here%E2%80%99s-the-source-code-to-hundreds-don%E2%80%99t-laugh/ Here's the source code to Hundreds. Don't laugh.
  560. Web site: Hundreds' metamorphosis from late night dream to addictive iOS puzzle game . June 7, 2014 . McWhertor . Michael . January 3, 2013 . . . https://web.archive.org/web/20130106052421/http://www.polygon.com/2013/1/3/3832576/hundreds-ios-puzzle-game-semisecret-software . January 6, 2013 . live.
  561. Web site: From Flash to Touch: How Hundreds Came to the iPad . June 8, 2014 . Martin . Garrett . January 22, 2013 . . . https://web.archive.org/web/20140714203538/http://www.pastemagazine.com/articles/2013/01/from-flash-to-touch-how-hundreds-came-to-the-ipad.html . July 14, 2014 . live.
  562. Web site: Inherit the Earth Soundtrack released . scummvm.org . 19 July 2020 . https://web.archive.org/web/20100612214425/http://scummvm.org/news/20051202/ . 12 June 2010 . 2 December 2005 . ScummVM supports [''Inherit the Earth''] as of 0.8.0, thanks to [...] the fact that [Wyrmkeep Entertainment] kindly provided us with all source code and the rights to reimplement it..
  563. Thomas . Neil . 20 January 2020 . Retro Tea Break: Eugene Sandulenko SCUMMVM Team Leader . Podcast . 19 July 2020 . 12:00 . . Sometimes, [the source code came] from original developers, like it was with Revolution Software or like it was with Adventure Soft later or as it was with Joe Pearce and his Inherit the Earth and [''[[The Labyrinth of Time]]] games [...]. But sometimes, a number of times, it has come from the IP right owners. So you know, some companies go bankrupt and then later another company acquire assets and they would like to put the game, let's say, on GOG –Good Old Games–, and this is where they approach us and they "Hey guys, here is the source code." Very often under NDA. For instance, it was the case with Tony engine..
  564. https://www.reddit.com/r/dosgaming/comments/693x1v/help_me_rescue_abandoned_dos_games/ help_me_rescue_abandoned_dos_games
  565. http://advsys.net/ken/klab/labflsrc.zip labflsrc.zip
  566. http://www.icculus.org/LAB3D/ LAB3D/SDL project page
  567. http://jspenguin.org:81/lab3d_sdl/ LAB3D-SDL + Hires texture support
  568. Web site: Filippos "md5" Karapetis . The labyrinth must be destroyed! . . 18 September 2020 . https://web.archive.org/web/20160203204727/http://www.scummvm.org/news/20160123/ . 3 February 2016 . 23 January 2016 . Many thanks to The Wyrmkeep Entertainment Co. for sharing the game's original source code with us! . live.
  569. https://web.archive.org/web/20130202173410/http://blog.rakeingrass.com/ Source code of Larva Mortus
  570. http://blog.rakeingrass.com/resources/larva_mortus_src.zip larva_mortus_src.zip
  571. Web site: Welcome!. https://web.archive.org/web/20121112171514/http://blog.rakeingrass.com/?cat=3. 2012-11-12.
  572. Gaming Alexandria . GamingAlexandri . 1259944619766362112 . 11 May 2020 . The source code for the Game Boy Color game "Little Mermaid II - Pinball Frenzy" together with a GBC emulator has been released by the sole developer Dave Ashley. . no . 12 May 2020 . https://archive.today/20200512134840/https://twitter.com/GamingAlexandri/status/1259944619766362112 . 12 May 2020 . live.
  573. Web site: Gilbert . Paul . Elementary, my dear Watson . . 14 June 2020 . https://web.archive.org/web/20151022234804/http://www.scummvm.org/news/20150913/ . 22 October 2015 . 13 September 2015 . The ScummVM Team is proud to announce support for both games of The Lost Files of Sherlock Holmes: The Case of the Serrated Scalpel, and The Rose Tattoo. Many thanks go to Electronic Arts, for allowing us access to the original sources. . live.
  574. Web site: Brian . Keller . MechCommander 2 EULA . Social.msdn.microsoft.com . 2006-03-22 . 2013-12-29 . dead . https://web.archive.org/web/20110728130939/http://social.msdn.microsoft.com/forums/en-US/gametechnologiesxna/thread/69572acd-8f34-404f-92e6-1c160b0867a1/ . 2011-07-28.
  575. Web site: Microsoft MechCommander 2 Shared Source Release . Daniel . Fleshbourne . 2006-08-18 . neowin.net . This is the Shared Source release for MechCommander 2. This release contains all of the source code and source assets required to build MechCommander 2. This release can be used with the Microsoft XNA Build March 2006 Community Technology Preview (CTP). . 2012-12-30. https://web.archive.org/web/20161220070747/https://www.neowin.net/news/microsoft-mechcommander-2-shared-source-release. 2016-12-20.
  576. https://web.archive.org/web/20160322023430/http://www.microsoft.com/en-us/download/details.aspx?id=11457 MechCommander 2 Source code
  577. https://github.com/alariq/mc2 mc2
  578. https://github.com/KeenSoftwareHouse/Miner-Wars-2081/blob/master/License.txt License.txt
  579. Web site: The Return of MiG Alley? . Robert . Mitchell . 2001-11-19 . 2013-01-06 . combatsim.com . Bob Mitchell: What has prompted you to release the source code for MiG Alley and Battle of Britain? Dave Whiteside: Because we are no longer doing flight sims [after Empire took us over at the end of 2001], and we would not be able to publish any patches that were required [no money was allocated to this], rather than let MiG die and all the code sit doing nothing it was considered a good idea, a swan song, if you like, for Rowan [after 13 years in the flight sim market]. . live . https://web.archive.org/web/20130122021050/http://www.combatsim.com/memb123/htm/2001/11/migalley-int/ . 2013-01-22.
  580. https://web.archive.org/web/20020808115915/http://www.simhq.com/simhq3/sims/downloads/migalley/migalley.exe migalley.exe
  581. Web site: LittleToonCat . "Your move, Commander." . https://web.archive.org/web/20240704215421/https://www.scummvm.org/news/20240703/ . 4 July 2024 . 3 July 2024 . Moonbase Commander, one of the very last games ever created in the SCUMM engine, is now finally supported and ready for public testing! [...] Many thanks to the current IP holder Rebellion for providing access to the game’s source code to the team! . live.
  582. https://web.archive.org/web/20070310222753/http://myweb.tiscali.co.uk/frobush/ Mr.Do! GameBoy source text file
  583. http://www.pauliehughes.com/downloads/ Mr. Do!
  584. Web site: Keeping the Myths Alive . Howard . Wen . 2004-06-10 . 2012-12-22 . linuxdevcenter.com . [...]fans of the Myth trilogy have taken this idea a step further: they have official access to the source code for the Myth games. Organized under the name MythDevelopers, this all-volunteer group of programmers, artists, and other talented people devote their time to improving and supporting further development of the Myth game series. . live . https://web.archive.org/web/20130406161344/http://www.linuxdevcenter.com/pub/a/linux/2004/06/10/mythdevelopers.html . 2013-04-06.
  585. http://www.projectmagma.net/ Myth II 1.7.2 Released for Linux!
  586. http://www.pangeasoft.net/nano/nanosource.html nanosource
  587. Web site: Facebook post #10159848709211410 . . 14 August 2021 . 29 May 2021.
  588. https://github.com/Ch0wW/pariah-uscript-source pariah-uscript-source
  589. News: Pirate's Adventure . BYTE . December 1980 . 18 October 2013 . Adams, Scott . 192 . live . https://web.archive.org/web/20150331043615/https://archive.org/stream/byte-magazine-1980-12/1980_12_BYTE_05-12_Adventure . 31 March 2015.
  590. News: Adventurous Bugs . BYTE . April 1981 . 18 October 2013 . 302 . live . https://web.archive.org/web/20140414211800/https://archive.org/stream/byte-magazine-1981-04/1981_04_BYTE_06-04_Future_Computers . 14 April 2014.
  591. Web site: Among the Missing: Notable Games Lost to Time . 2012-10-17. 2015-06-19 . Todd . Ciolek . . Prince of Persia creator Jordan Mechner believed that the source code to the game's original Apple II version was gone when he failed to find it in 2002. Ten years later, Mechner's father uncovered a box of old games at the family home, and among them were disks containing Prince of Persia's bedrock program..
  592. Mastrapa . Gus . The Geeks Who Saved Prince of Persia's Source Code From Digital Death . . 2012-04-20 . 2012-11-30 . live . https://web.archive.org/web/20121208145629/http://www.wired.com/gamelife/2012/04/prince-of-persia-source-code . 2012-12-08 .
  593. https://github.com/NagyD/SDLPoP SDLPoP
  594. http://www.remaininplay.com/showgame/Battle%20of%20Britain/ source code mirror
  595. Web site: Booker . Logan . The Weekly Humble Bundle Is A Dream For Budding Game Developers . . . 29 April 2020 . https://web.archive.org/web/20150920224948/http://www.kotaku.com.au/2015/09/the-weekly-humble-bundle-is-a-dream-for-budding-game-developers/ . 20 September 2015 . 20 September 2015 . live.
  596. Web site: Stahie . Silviu . Humble Weekly Bundle Brings Games and Their Source Code . . 29 April 2020 . https://web.archive.org/web/20151012080650/http://news.softpedia.com/news/humble-weekly-bundle-brings-games-and-their-source-code-492052.shtml . 12 October 2015 . english . 18 September 2015 . live.
  597. http://www.piratesahoy.net/threads/we-have-the-storm-engine.15184/ We have the storm engine!
  598. https://www.madfingergames.com/pla/deadzone SHADOWGUN: DEADZONE PUBLIC LICENSE AGREEMENT
  599. https://www.madfingergames.com/shadowgun/deadzone/news/6 MADFINGER IS GIVING AWAY SOURCES AND ASSETS TO THE PUBLIC!
  600. https://code.google.com/p/shadogrounds-and-shadowgrounds-survivor/ Shadowgrounds license
  601. Web site: Frozenbyte Open-Sources Shadowgrounds Games . Larabel . Michael . 2011-04-22 . . 2011-05-06 . live . https://web.archive.org/web/20110425093731/http://www.phoronix.com/scan.php?page=news_item&px=OTM2NA . 2011-04-25.
  602. Web site: Siegler . Joe . Shadow Warrior Source Code Released . . 1 May 2020 . https://web.archive.org/web/20051026230848/http://www.3drealms.com/news/2005/04/shadow_warrior_12.html . 26 October 2005 . 1 April 2005 . live.
  603. Web site: Submarine marries Destroyer: The long vaunted union of SSI naval-sims is complete – thanks to fans. . . William . Trotter . 2003-05-01 . 2017-05-06 . gave source code to subsim.com [...] a fund raising drive netted more than $7000 to jump-start Project Messerwetzer [...] Skilled volunteers and playtesters rallied to the call [...] a free 5MB to 6MB patch that will be finally polished and playtested. The original crippling flaw, multiplayer instability, has been dramatically minimized [...] . live . https://web.archive.org/web/20160610051057/http://www.subsim.com/ssr/pcgamer_pmarticle.html . 2016-06-10.
  604. http://www.gry-online.pl/S013.asp?ID=50807 Najciekawsze modyfikacje (15/03/10)
  605. http://www.pcgames.de/Silent-Hunter-2-Spiel-33033/News/Silent-Hunter-2-Pacific-Aces-285720/ Silent Hunter 2: Pacific Aces
  606. https://web.archive.org/web/20090714041818/http://www.zdenekstary.info/ZXS.html ZXS
  607. Web site: DreamMaster . It's a Bar... In Space! . https://web.archive.org/web/20240704164905/https://www.scummvm.org/news/20240615/ . 4 July 2024 . 15 June 2024 . In a universe where bagels meet bars, the BAGEL engine has been perfectly toasted, and the ScummVM team is now ready to serve a slice of The Space Bar nostalgia. [...] This is thanks to the kind people at ZOOM Platform, who provided us with the original game sources to work with. . live.
  608. Web site: Space Engineers Shares Source Code . Alice . O'Connor . 2015-05-15 . 2015-06-16 . . live . https://web.archive.org/web/20150623064548/http://www.rockpapershotgun.com/2015/05/15/space-engineers-open-source/ . 2015-06-23.
  609. Web site: Space Engineers – full source code access, total modifications and 100,000 USD fund . 2015-05-14 . Today we have a very important announcement for our modders and our community. We decided to give you 100% complete access to Space Engineers' source code. This comes as a continuation of our decision to give more freedom to modders and community. . Marek . Rosa . 2015-06-16 . marekrosa.org . live . https://web.archive.org/web/20150622094940/http://blog.marekrosa.org/2015/05/space-engineers-full-source-code-access_40.html . 2015-06-22.
  610. https://github.com/KeenSoftwareHouse/SpaceEngineers SpaceEngineers
  611. Web site: Johnson . Ethan . Enter Your Initials: Preserving The Source Code of Star Fire, a Forty Year Old Arcade Game . Gaming Alexandria . 23 August 2020 . https://web.archive.org/web/20200823042547/https://www.gamingalexandria.com/wp/2020/08/21/enter-your-initials-preserving-the-source-code-of-star-fire-a-forty-year-old-arcade-game/ . 23 August 2020 . 21 August 2020 . live.
  612. https://archive.org/details/AtariStarRaidersSourceCode AtariStarRaidersSourceCode
  613. http://wilmunder.com/Arics_World/Games.html Games
  614. https://github.com/XioNYC/StarRaiders Star Raiders (Version 25.1/Stardate "26-JUL-79")
  615. https://github.com/lwiest/StarRaiders Starraiders
  616. http://www.pcgames.de/Star-Trek-Voyager-Elite-Force-2-Spiel-34923/News/Elite-Force-2-Quellcode-veroeffentlicht-245041/ Elite Force 2 - Quellcode veröffentlicht
  617. http://eliteforce.gamebub.com/tools.php Elite Force I and II Tools and File - Elite Force II EF2 Source Code
  618. http://a2central.com/6522/brian-fitzgerald-grants-release-of-source-code-to-taxman-pac-man-clone/ Brian Fitzgerald grants release of source code to TAXMAN, Pac-Man clone
  619. http://www.callapple.org/vintage-apple-computers/apple-ii/source-code-to-be-taxman-released/ source-code-to-be-taxman-released
  620. https://github.com/burgerbecky/taxman taxman
  621. https://forums.duke4.net/topic/5787-terminal-velocity/page__view__findpost__p__225161 "I have access to Terminal Velocity, Fury3, and Hellbender's official source codes."
  622. https://www.vogons.org/viewtopic.php?f=24&t=45103Terminal Velocity/Fury3/Hellbender modern port WIP
  623. http://www.dlh.net/de/gaming-news/4522/der-clou!-quellcode-veroffentlicht.html Der Clou! Quellcode veröffentlicht
  624. http://www.patje.de/2006/12/spieleklassiker-der-clou-1994/ Spieleklassiker: Der Clou (1994)
  625. http://cosp.sourceforge.net/ cosp.sourceforge.net/
  626. http://www.gamasutra.com/view/news/300763/Dev_rescues_80s_text_adventure_source_code_by_baking_tapes_in_an_oven.php Dev rescues '80s text adventure source code by baking tapes in an oven
  627. https://strandgames.com/blog/magnetic-scrolls-games-source-code-recovered Magnetic Scrolls Original Games Source Code Recovered!
  628. https://archive.org/details/1980-07-recreational-computing 1980-07-recreational-computing.pdf
  629. http://derelllicht.com/winwiz.html The Wizard's Castle windows port
  630. Web site: Aidley . Tim . The Future of Tilt Brush . . . 26 January 2021 . https://web.archive.org/web/20210126204821/https://opensource.googleblog.com/2021/01/the-future-of-tilt-brush.html . 26 January 2021 . 26 January 2021 . live.
  631. Web site: sev . Tony Tough, a New Supported Game . . 19 July 2020 . https://web.archive.org/web/20130601175308/http://forums.scummvm.org/viewtopic.php?t=11900 . 1 June 2013 . 25 October 2012 . The ScummVM team, in close collaboration with Nayma soft (the legal rights owner) and DotEmu, is happy to announce support for Tony Tough in our development branch. . live.
  632. http://www.moodurian.com/tornado/forum/index.php?PHPSESSID=5de61013a02dc2c382d466e2dc8a4fa5&topic=9.msg32#msg32 Tornado source code and Interplay
  633. https://github.com/tornadorebooted/tornado-dos-flightsim tornado-dos-flightsim
  634. http://assemblergames.com/l/threads/tornado-dos-flight-sim-source-code-released-on-github.65211/#post-935182 tornado-dos-flight-sim-source-code-released-on-GitHub
  635. http://www.peroxide.dk/projects_old.shtml Escape from Mount Drash
  636. Web site: Patchy Like It's 1998: Unreal 1 Updated . The list of fixes upon fixes are too long to mention here, but the essential purpose of v227 is to add DirectX9 and OpenAL support as well as mending everything that needs mending. Epic are aware of and permit the patch [...] . Alec . Meer . . 2012-10-12 . 2012-12-21 . live . https://web.archive.org/web/20130115204932/http://www.rockpapershotgun.com/2012/11/12/patchy-like-its-1998-unreal-1-updated/ . 2013-01-15.
  637. http://www.dsogaming.com/news/epics-tim-sweeney-says-that-unreal-engine-1-may-one-day-go-open-source/ Epic's Tim Sweeney Says That Unreal Engine 1 May One Day Go Open Source
  638. Web site: The original Unreal Tournament just got a new patch with hundreds of fixes. The patch is the work of the OldUnreal forum, building on work from the UTPG (Unreal Tournament Preservation Group), a collective of community programmers and server admins that took over after Epic Games wound up its official support. It contains hundreds of fixes for crashes, visual issues, networking, physics and player movement which have arisen over the years as the game is player on newer PCs. . Tom. Phillips. Eurogamer. September 23, 2020 . March 21, 2023 .
  639. Web site: Darwinia and Multiwinia Source Code Released . 2010-07-09 . Michael . Rose . indiegames.com . live . https://web.archive.org/web/20131003035329/http://indiegames.com/2010/07/darwinia_and_multiwinia_source.html . 2013-10-03.
  640. http://www.introversion.co.uk/store/ The Source Code
  641. Savetz. Kay. KaySavetz. 1248011083308134404. 8 April 2020. Carol Shaw sent me the source code for Checkers for the Atari 2600, asking me to share it online. I carefully photographed it and uploaded it to @internetarchive. Perhaps someone will turn it into a text source code file.. 17 April 2020. https://archive.today/20200417183055/https://twitter.com/KaySavetz/status/1248011083308134404. 17 April 2020. live.
  642. http://distractionware.com/blog/2020/01/vvvvvv-is-now-open-source/ vvvvvv-is-now-open-source
  643. https://github.com/TerryCavanagh/VVVVVV/blob/master/LICENSE.md license.md
  644. Web site: VVVVVV goes open source for its 10 year anniversary . Fraser . Brown . 10 January 2020 . 10 January 2020 . PC Gamer.
  645. Web site: Quarter-Two Three Forums, discussion regarding the state of Warlords Battlecry 3's source code . 13 June 2006 . live . https://web.archive.org/web/20150602235247/http://www.quartertothree.com/game-talk/showthread.php?27026-Warlords-Battlecry-3-Source-Code-Available%21 . 2015-06-02.
  646. Web site: The Gibberlings 3 Forum discussion regarding the state of Warlords Battlecry 3's source code . dead . https://web.archive.org/web/20140529052430/http://forums.gibberlings3.net/index.php?showtopic=6119 . 2014-05-29 . 2014-08-11.
  647. http://www.patches-scrolls.com/warlords_battlecry3.php Unofficial Patches
  648. http://www.gog.com/forum/warlords_battlecry_series/warlords_battlecry_iii_has_been_updatedagain/post16 links to prominent mods and unofficial patches for WBC3
  649. https://github.com/codeka/wwmmo/blob/master/LICENSE license
  650. https://www.reddit.com/r/IndieGaming/comments/2e1vc3/after_3_years_my_indie_game_is_shutting_down/ shutting down
  651. http://www.war-worlds.com/blog/2014/08/war-worlds-is-shutting-down war-worlds-is-shutting-down
  652. https://github.com/codeka/wwmmo wwmmo
  653. Web site: Capstone Source Archive . Lesbird.com . 2015-06-21 . live . https://web.archive.org/web/20150621123327/http://www.lesbird.com/CAPSTONE/ . 2015-06-21.
  654. http://worms2d.info/Silkworm Silkworm
  655. https://worms2d.info/People/Deadcode Deadcode
  656. https://worms2d.info/Updates_(Worms_Armageddon) Updates_(Worms_Armageddon)
  657. Web site: Community Coder Program! . 25 June 2014 . goldhawkinteractive . 2015-07-09 . live . https://web.archive.org/web/20150710172056/http://www.goldhawkinteractive.com/forums/showthread.php/10965-Community-Coder-Program%21 . 2015-07-10.
  658. Web site: What is Xenonauts: Community Edition & how do I get it? . 15 August 2014 . goldhawkinteractive.com . 2015-07-09 . live . https://web.archive.org/web/20150710164427/http://www.goldhawkinteractive.com/forums/showthread.php/11882-What-is-Xenonauts-Community-Edition-how-do-I-get-it . 2015-07-10.
  659. https://github.com/Ch0wW/xiii_unrealscript xiii_unrealscript