The Free and Fast Arena Shooter
A free multiplayer & singleplayer first person shooter, the successor of the Cube FPS.
Risen3D is an advanced Doom port by Graham Jackson based on Jaakko Keranen's Doomsday port.
An open source first-person shooter game built on a very unconventional landscape-style engine.
Free fast-paced first-person shooter set in a cyberpunk universe