First-person shooter game

Source port for Build engine games

Free agile arena shooter

EDuke32 is an awesome, free homebrew game engine

Open Source voxel shooter

Der freie und schnelle Arena-Shooter

Open source first person shooter

Modern cross-platform port of the Descent engine

Open source first person shooter

Free fast paced arena shooter

Game engine for Return to Castle Wolfenstein

Shoot and survive

Game engine for Classic Doom

Epic story-driven FPS running on the Build Engine

The orb ponderer's arena first-person shooter

Classic arena first person shooter

Leading the way in newschool multiplayer Doom online

Dhewm 3 is a Doom 3 GPL source port

A modernization effort of DOOM-3-BFG

Top-down shooter action RPG

A Quake mod based on the retro shooter SPRAWL

ReC98 source port of the first Seihou Project game

FPS aim trainer

Aliens vs Humans, First Person Shooter game with elements of Real Time Strategy

Eine moderne Plattformen übergreifende Portierung von „STAR WARS™: Dark Forces“ mit Unterstützung für Modifikationen

Yamagi Quake II is an alternative client for id Software's Quake II

Tank digging battle game

a modern QuakeWorld client focused on competitive online play

A Zandronum 3.0 fork with improved netcode, configurable movement and many small tweaks

Fast paced, first person strategy game