Abyss is a 1980 role-playing game adventure for Tunnels & Trolls published by Flying Buffalo.
Abyss is a solitaire adventure for a Tunnels & Trolls player character who has died, and the character's journey through the underworld for rebirth.
Jerry Epperson reviewed Abyss in The Space Gamer No. 33.[1] Epperson commented that "Abyss, for all its deadliness, belongs in every T&T player's library."[1]