a modern QuakeWorld client focused on competitive online play

First-person shooter game

Source port for Build engine games

A Quake mod based on the retro shooter SPRAWL

ReC98 source port of the first Seihou Project game

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

Leading the way in newschool multiplayer Doom online

Free agile arena shooter

Tank digging battle game

Shoot and survive

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

Free fast paced arena shooter

FPS aim trainer

Epic story-driven FPS running on the Build Engine

The Free and Fast Arena Shooter

Open source first person shooter

EDuke32 is an awesome, free homebrew game engine

Game engine for Classic Doom

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

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

Fast paced, first person strategy game

Dhewm 3 is a Doom 3 GPL source port

First-person shooter with cooperative in-game map editing

Game engine for Return to Castle Wolfenstein

A modernization effort of DOOM-3-BFG

Open source first person shooter

Open Source voxel shooter

Modern cross-platform port of the Descent engine

Top-down shooter action RPG

Classic arena first person shooter