Tremulous is described as '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 both teams are able to build working structures in-game like an RTS' and is a first-person shooter in the games category. There are more than 25 games similar to Tremulous for a variety of platforms, including Windows, Linux, Mac, Steam and Playstation apps. The best Tremulous alternative is Xonotic, which is both free and Open Source. Other Tremulous like games are Counter-Strike, Quake, Doom and Red Eclipse.
Urban Terror started as a realism based "total conversion" mod for Quake III Arena. Nowadays, Urban Terror is played using the free, stand-alone, ioquake3 engine modified, which doesn't require Quake III Arena, in addition to being an add-on to id Software's...
The game is inspired by such classic titles as Quake and Doom, with the emphasis on killing large numbers of monsters. The game is divided into five chapters, each about five levels long. The player's objective is to get through each level, from start to finish, by...
Unvanquished is a free, open-source first-person shooter combining real-time strategy elements with a futuristic, sci-fi setting. It is available for Windows, Linux, and Mac OS X.
Dead Space is a survival horror third-person shooter video game for Microsoft Windows, PlayStation 3 and Xbox 360.
The Darkness II is an intense first person shooter that puts you in the role of Jackie Estacado, don of a New York crime family and wielder of an ancient force of chaos known as The Darkness.
Zandronum is a multiplayer oriented port, based off Skulltag, for Doom and Doom II by id Software.
Blacklight Retribution is a fast paced, adrenaline pumping free to play first person shooter (FPS) based in a futuristic urban warzone. Blacklight Retribution provides FPS enthusiasts with a massive arsenal of weaponry and gear ranging from bleeding edge side arms to massive...
Natural Selection 2 is a RTS/Shooter/Biter that you either play as marines or aliens, it is currently under development by Unknown Worlds.
A truly free and open source multiplayer shooter, no strings attached. Have casual deathmatch matches on various scenarios. Build your own levels with the ingame editor and assets that come with the game, or just play around and use it as a sandbox.
Singularity is a first-person shooter with survival-horror elements. A main gameplay device is an artifact known as the Time Manipulation Device (TMD). The TMD is powered by an E-99 core, and can manipulate time.
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