Shoot and survive

First-person shooter game

Der freie und schnelle Arena-Shooter

Leading the way in newschool multiplayer Doom online

a modern QuakeWorld client focused on competitive online play

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

Free fast paced arena shooter

Tank digging battle game

A Quake mod based on the retro shooter SPRAWL

Classic arena first person shooter

A modernization effort of DOOM-3-BFG

Free agile arena shooter

Epic story-driven FPS running on the Build Engine

Dhewm 3 is a Doom 3 GPL source port

Open source first person shooter

Open Source voxel shooter

FPS aim trainer

Open source first person shooter

Game engine for Classic Doom

Source port for Build engine games

Fast paced, first person strategy game

ReC98 source port of the first Seihou Project game

First-person shooter with cooperative in-game map editing

A free first person shooter for Mac, PC and Linux

Top-down shooter action RPG

Game engine for Return to Castle Wolfenstein

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

EDuke32 is an awesome, free homebrew game engine

Modern cross-platform port of the Descent engine

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