| Onechanbara | |
| Developer: | Tamsoft |
| Publisher: | D3 Publisher |
| Genre: | Hack and slash |
| Platforms: | PlayStation 2, Xbox 360, Nintendo Wii, PlayStation Portable, PlayStation 3, PlayStation 4, Microsoft Windows |
| First Release Version: | Zombie Zone |
| First Release Date: | August 7, 2004 |
| Latest Release Version: | OneeChanbara Origin |
| Latest Release Date: | December 5, 2019 |
, initially defined, is a series of action-adventure hack and slash video games originally developed by Tamsoft for D3 Publisher's Simple 2000 series. The title is a portmanteau of the Japanese words and . The series centers around Aya, a cowgirl who wears a scarf and wields a katana, who is pitted against hordes of zombies and other monsters.
Players guide their characters through the stages, completing tasks while fighting through enemies. The player-character's weapon becomes progressively covered in blood, causing their attacks to be slower and to inflict less damage, even getting stuck in enemies if it gets too bad. This is represented by a "Blood Meter" showing how dirty the weapon is. To prevent this, players must actively clean off their sword to keep the blood meter from filling up.[1] [2]
In addition, there is also the "Blood Lust" meter. As a character kills enemies, this meter starts to fill. Once the meter is full, the character will go into a "blood frenzy". This gives the character an increase in attack power, but drains health. To recover from a blood frenzy, the player must use statue items, which are dropped by dead enemies. Additionally each level will contain a large statue. Going to the large statue will remove the blood frenzy and also recover any lost health.
Aya, the series' main character, has also appeared in Simple 2000 Series Vol. 91: The All*Star Kakutou Matsuri (released as All-Star Fighters in Europe in March 2007), a fighting game featuring characters from many different Simple 2000 series releases.