Odamex is a free, cross-platform, modern client-server Doom engine
LGSL (Live Game for PHP 5.4-8+: online status for various gameservers
If you can't connect your controller to PC, this program will do it.
A real-time 3D Engine written in Ada
3rd Party Video Games Developer: MetalManGames, titles of games
A free 3d game for PC that does not limit the player. Fight,Build,Gain
Merges WAD files for Doom engine games.
Space shooter style game arcade version - Games/Entertainment Software
A fun realistic multiplayer free-and-open-source first-person-shooter!
first person shooter, space invader
The famous Maze War game recreated as a modern web application.