Alien Arena is a fast, free FPS deathmatch game.

AU Modern FPS is a browser-based game.

Nexuiz is a multiplayer first-person shooter. It is distributed under the GNU General Public License (GPLv2).

Quake is a series of first-person shooter video games, starting with the game of the same name.

Tremulous is a free and open source team-based first-person shooter with real-time strategy elements.

Unreal Tournament is a first-person shooter video game.

AssaultCube (ActionCube) is a free and open source software first-person shooter video game.

Counter-Strike is a series of multiplayer first-person shooter video games, in which teams of terrorists and counter-terrorists battle to, respectively, perpe…

OpenArena is a free and open-source video game, it is first-person shooter (FPS) and a video game clone of Quake III Arena.

Team Fortress 2 is a team-based multiplayer first-person shooter video game developed and published by Valve Corporation.

TrueCombat: Elite & CQB is a tactical-teamplay oriented, modern-world combat simulation game.

Unvanquished is an opensource first-person strategy shooter game.