Catacomb Abyss is a 1992 first-person shooter for MS-DOS developed by Softdisk, serving as a sequel to Catacomb 3-D. Built on early 3D technology, it casts players as the magician Petton Everhail, battling undead creatures in a maze-like underground world. Featuring magical attacks and destructible walls, it was a precursor to more advanced FPS games like Wolfenstein 3D, and remains a notable part of early PC gaming history.