Doom (Series)

Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation. It is a complete remake of Counter-Strike using the Source game engine.

Quake 2 is a FPS by Id Software and it is the sequel to the game quake. several ports of the engine are available on a multitude of platforms includeing …

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!

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 …

Digital Paint: Paintball 2 is a Paintball game that started out as a mod for quake 2 but then took on a life of its own as an open source …

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 …

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 …

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

Wolf Team is a fast paced 3D MMOFPS that features the ability for players to transform between playing as a Human or as a Werewolf. Humans have an assortment of …

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