A free first person shooter for Mac, PC and Linux

Epic story-driven FPS running on the Build Engine

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

First-person shooter with cooperative in-game map editing

First-person shooter game

Tank digging battle game

Jeu de stratégie frénétique à la première personne

A Quake mod based on the retro shooter SPRAWL

Classic arena first person shooter

Leading the way in newschool multiplayer Doom online

Modern cross-platform port of the Descent engine

Shoot and survive

Free fast paced arena shooter

Free agile arena shooter

A modernization effort of DOOM-3-BFG

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

Game engine for Classic Doom

Le jeu de tir Arena-shooter libre et rapide

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

Game engine for Return to Castle Wolfenstein

Dhewm 3 is a Doom 3 GPL source port

ReC98 source port of the first Seihou Project game

Source port for Build engine games

Top-down shooter action RPG

FPS aim trainer

Open source first person shooter

a modern QuakeWorld client focused on competitive online play

Open source first person shooter

EDuke32 is an awesome, free homebrew game engine

Open Source voxel shooter