Epic story-driven FPS running on the Build Engine

Dhewm 3 is a Doom 3 GPL source port

Source port for Build engine games

Leading the way in newschool multiplayer Doom online

Free agile arena shooter

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

Open Source voxel shooter

A modern cross‑platform port of “STAR WARS™: Dark Forces” with mod support

Tank digging battle game

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

A Doom II mod with weapons and mechanics inspired by Quake Champions

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

Classic arena first person shooter

a modern QuakeWorld client focused on competitive online play

First-person shooter game

FPS aim trainer

Fast arcade first person shooter

A modernization effort of DOOM-3-BFG

Modern cross-platform port of the Descent engine

A Quake mod based on the retro shooter SPRAWL

Jeu de stratégie frénétique à la première personne

Open Source voxel shooter

Le jeu de tir Arena-shooter libre et rapide

Game engine for Classic Doom

EDuke32 is an awesome, free homebrew game engine

The orb ponderer's arena first-person shooter

Free fast paced arena shooter

Shoot and survive

ReC98 source port of the first Seihou Project game

Top-down shooter action RPG