DOOM Open Source Release

Space exploration, trading, and combat game.

GZDoom is a feature centric port for all Doom engine games, based on ZDoom, adding an OpenGL renderer and powerful scripting capabilities

Open-source clone of the original X-Com 👽

It's a Doom editor

Descent-Rebirth and Descent II-Rebirth

My software-only 3D renderer and raytracer (aka "TTSIOD renderer")

CatacombGL is a source port with OpenGL graphics for Catacomb 3D (1991), The Catacomb Abyss (1992), The Catacomb Armageddon (1992) and The Catacomb Apocalypse (1993).