Catacomb Abyss

Catacomb Abyss is a fantasy themed first-person shooter game developed by Softdisk and released in November 1992 for DOS. It is the fourth entry in the Catacomb series of video games. Its predecessor, Catacomb 3-D, was developed by id Software as part of a contract with Softdisk. When the contract ended, Softdisk kept ownership of both the 3D engine as well as the intellectual property of Catacomb 3-D. The company formed a new, in-house team to develop three sequels, known as the Catacomb Adventure Series. This trilogy consists of Catacomb Abyss, Catacomb Armageddon and Catacomb Apocalypse. Softdisk published a shareware version of Catacomb Abyss, which could be freely distributed and played to encourage gamers to purchase the full trilogy.