Epic story-driven FPS running on the Build Engine

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

Dhewm 3 is a Doom 3 GPL source port

Source port for Build engine games

Free agile arena shooter

Shoot and survive

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

Fast arcade first person shooter

Tank digging battle game

Classic arena first person shooter

Open Source voxel shooter

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

First-person shooter game

A modernization effort of DOOM-3-BFG

A Quake mod based on the retro shooter SPRAWL

Modern cross-platform port of the Descent engine

Leading the way in newschool multiplayer Doom online

Fast paced, first person strategy game

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

The Free and Fast Arena Shooter

FPS aim trainer

a modern QuakeWorld client focused on competitive online play

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

The orb ponderer's arena first-person shooter

Top-down shooter action RPG

Game engine for Return to Castle Wolfenstein

ReC98 source port of the first Seihou Project game

EDuke32 is an awesome, free homebrew game engine

Free fast paced arena shooter

Game engine for Classic Doom