A modern, cross-platform Quake game engine based on FitzQuake.
A cross-platform port of Hexen II game.
Open source FPS/RTS Game
A free 3d game for PC that does not limit the player. Fight,Build,Gain
DOOM / Heretic / Hexen source port with enhanced graphics and UI
A fun realistic multiplayer free-and-open-source first-person-shooter!
A basic 3D environment with a first-person POV
Cross platform administration tool for Source Engine dedicated servers
Nexuiz-Xonotic Client
Reference implementation for the Doom game engine.