Epic story-driven FPS running on the Build Engine

Shoot and survive

Source port for Build engine games

Dhewm 3 is a Doom 3 GPL source port

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

Free agile arena shooter

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

Classic arena first person shooter

Open Source voxel shooter

Tank digging battle game

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

Fast arcade first person shooter

A Quake mod based on the retro shooter SPRAWL

a modern QuakeWorld client focused on competitive online play

Modern cross-platform port of the Descent engine

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

The orb ponderer's arena first-person shooter

Free fast paced arena shooter

A modernization effort of DOOM-3-BFG

The Free and Fast Arena Shooter

First-person shooter game

First-person shooter with cooperative in-game map editing

ReC98 source port of the first Seihou Project game

Leading the way in newschool multiplayer Doom online

Top-down shooter action RPG

FPS aim trainer

A free first person shooter for Mac, PC and Linux

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

Game engine for Classic Doom

Game engine for Return to Castle Wolfenstein