Doom (Series)

Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux. The project is geared towards providing addictive arena shooter gameplay which is all spawned …

AssaultCube is a FREE multiplayer first-person shooter game. Taking place in realistic environments, with fast, arcade gameplay, it's addictive and fun!

Tremulous is a free, open source game that blends a team based FPS with elements of an RTS. Players can choose from 2 unique races, aliens and humans. Players on …

UFO: Alien Invasion is a strategy video game in which the player fights aliens that are trying to take control of the Earth. The game is heavily influenced by the …

The Mana World (TMW) is a serious effort to create an innovative free and open source MMORPG. TMW uses 2D graphics and aims to create a large and diverse interactive …

What is RetroArch? RetroArch is a modular multi-system emulator system that is designed to be fast, lightweight, and portable. It has features few other emulators frontends have, such as real-time …

Jake2 is a Java 3D game engine. It is a port of the GPL’d Quake2 game engine from id Software. To use the Jake2 engine you need either the data …

Eternal Lands (EL) is a free, multiplayer, online role-playing game (MMORPG) created by Radu Privantu in 2002. The setting is a medieval fantasy world. There are historic elements such as …

Stendhal is a fun friendly and completely free 2D multiplayer online adventure game with an old school feel.

Evol Online is a massively multiplayer online role-playing game using source forked from The Mana World. The games' interface is so closely related that players can use the same client …

The Freedoom project aims to create a complete Doom-based game which is Free Software. Combined with a free source port, people will also be able to play the back catalog …

The Hammer of Thyrion project is a cross-platform source port effort of Raven Software's Hexen.