| Title | Developer, Publisher | Release date | Operating system | Engine | License | Notes |
| .kkrieger | .theprodukkt | 2004 | WIN | | Proprietary license | Won first place in the 96k game competition at Breakpoint in April 2004. |
| America's Army 3 | MOVES Institute | | WIN | Version 3.0 and under: Unreal engine 3.0 | Proprietary license | Developed for and owned by the U.S. government. Multiplayer/Training mode. |
| AssaultCube | Rabid Viper Productions | 2007-2009 | LIN, OSX, WIN | Cube engine (modified) | zlib License (code), Individual licenses (media) | Team based shooter, includes Cube's map maker. Single/Multiplayer. |
| Black Shades | Wolfire games | Unknown | WIN MAC IPHONE | Wolfire Games | Freeware | Free First-person shooter |
| Black Shot | Vertigo Games, Outspark, Garena | 2009 (April 30) (Garena Blackshot) | WIN | Gamebryo | Proprietary license | Closed beta ended. Open beta has not yet started. Requires registration at their website and not playable outside North America. |
| BZFlag | Chris Schoeneman, Tim Riker | 1993–2007 | BSD, LIN, OSX, WIN, other UNIX | | GNU GPL | Tank combat. |
| CodeRED: Alien Arena | COR Entertainment, LLC | 2004–2009 | BSD, LIN, OSX (unofficial), WIN | CRX Engine id Tech 2 id Tech 3 | GNU GPL (code), Proprietary license (media) | Science fiction, with single or multiplayer modes. |
| Combat Arms | Nexon | 2008 (November 07) | WIN | Lithtech | Proprietary license | Online multiplayer, with a modern setting |
| CrossFire | Z8GAMES | 2009 (August) | WIN | Lithtech | Proprietary license | An online muliplayer game where you can play different game styles such as Ghost Mode, Search and Destroy, ETC. Register at their website |
| Cube | Wouter van Oortmerssen | 2001-2005 | BSD, LIN, OSX, WIN, iPhone | Cube engine | zlib License | Quake style multiplayer deathmatch. Single/Multiplayer. |
| Cube 2: Sauerbraten | Wouter van Oortmerssen | 2004-2009 | BSD, LIN, OSX, WIN | Cube 2 engine | zlib License (code), Individual licenses (media) | Quake style deathmatch, includes built in level editor. Single/Multiplayer. |
| The Dinohunters | Kuma Reality Games | 2006 | WIN | Source engine | Proprietary license | Also a machinima series. Single/Multiplayer. |
| Exteel | NCSoft | 2007 (July 12) | WIN | Unreal Engine 2.0 | Proprietary license | An online mech-based FPS. |
| FreeDoom | FreeDoom team | | LIN, OSX, WIN | Doom engine | GNU GPL (code), BSD (media) | A Doom WAD file intended to be used instead of the copyrighted file from the original Doom and Doom II. |
| Gore: Special Edition | 4D Rulers | 2008 | WIN | AMP engine | Proprietary license | |
| Hidden & Dangerous | Illusion Softworks, Take-Two Interactive | 1999 | WIN | Insanity Engine | Proprietary license | Released free to promote its sequel, Hidden & Dangerous 2. Single/Multiplayer. |
| The Kill Point: Game | Kuma Reality Games | 2007 | WIN | Source engine | Proprietary license | Episodic First person shooter Based on the television show The Kill Point. |
| Kuma\War | Kuma Reality Games | 2004 | WIN | Source engine | Proprietary license | Tactical episodic shooter. Single/Multiplayer. |
| Legends | | 2003? | LIN, WIN | Torque Gaming Engine | Proprietary license | First-Person Shooter with Jetpacks, Multiplayer, CTF, Deathmatch |
| Lone Wolf 3 | VENOM Software | 2009 | WIN | VGFX_OpenGL | Proprietary license | First-Person Shooter with 5 outdoor levels, 13 weapons, 4 enemies, 4 power-ups and slow motion mode. |
| Marathon | Bungie Studios | 1994–1996 | MAC (original), ported to OSX, LIN and WIN via AlephOne | Aleph One | GNU GPL (code) | Released as freeware and source code. |
| Nexuiz | Alientrap | 2005 (May 31) | LIN, OSX (10.4 or later), WIN | DarkPlaces Quake engine | GNU GPL | Unreal Tournament style deathmatch. Single/Multiplayer. |
| OpenArena | OpenArena team | 2008 (October 31) | LIN, OSX, WIN | ioquake3 id Tech 3 | GNU GPL | Free software content remake of Quake III Arena. Single/Multiplayer. |
| Parabellum | Acony, K2 Networks, Gamersfirst | 2009 | WIN | Unreal 3 Engine, PhysX | Proprietary license | Free modern multiplayer shooter, in closed beta. | |
| Point Blank | Zepetto, NCsoft | 2009 | WIN | N/A | Proprietary license | Free FPS created by Zepetto in 2009. Close Beta version. | |
| Postal² | Running With Scissors | 2003 | LIN, OSX, WIN | Unreal Engine 2.0 | Proprietary license | The multiplayer component of commercial game Postal2STP. |
| Purge | Freeform Interactive | 2003 (April 15) | WIN | Lithtech: Talon engine | Proprietary license | RPG hybrid where you can level up and increase stats by earning experience points. |
| Quake Live | id software | 2009 (February 24) | WIN, LIN and OSX | id Tech 3 | Proprietary license | A free web based version of Quake III Arena, playable in full screen mode. |
| Savage: The Battle for Newerth | S2 Games | 2003 | LIN, OSX (commercial), WIN | Silverback Engine | Proprietary license | Hybrid FPS/RTS with both ranged and melee combat |
| Savage 2: A Tortured Soul | S2 Games | 2008 (January 16) | LIN, OSX, WIN (commercial) | K2 Engine | Proprietary license | The sequel to the award-winning game, Savage: The Battle for Newerth. |
| Shootout the Game | Kuma Reality Games, The History Channel | 2006 | WIN | Source engine | Proprietary license | With the History Channel TV show. Single/Multiplayer. |
| Smokin' Guns | Smokin' Guns Productions and Iron Claw Interactive | 2009 (January 1) | LIN, WIN | id Tech 3 | GNU GPL (code/some media) Proprietary license (some media) | Western Quake-like FPS. Single (with bots)/Multiplayer. |
| Starsiege: Tribes | Dynamix, Sierra Entertainment | 2004 (free release) | WIN | Darkstar engine | Proprietary license | Futuristic team based combat, released for free to promote Tribes: Vengeance. Single/Multiplayer. |
| Sudden Attack | Gamehi | N/A | Win | Lithtech | Proprietary license | Sudden Attack is an Online Multiplayer Game. by Gamehi |
| Tribes 2 | Dynamix, Sierra Entertainment | 2004 (free release) | WIN | Torque Game Engine | Proprietary License | Futuristic team based combat, released for free to promote Tribes: Vengeance. |
| Tremulous | Dark Legion Development | 2006 | LIN, OSX (unofficial), WIN | ioquake3 id Tech 3 | GNU GPL | Aliens vs Humans multiplayer team combat with some RTS elements. |
| Urban Terror | Silicon Ice Development / Frozen Sand | 2007 (April 1) | LIN, OSX, WIN | ioquake3 id Tech 3 | GNU GPL (code), Proprietary license (media) | Originally a Quake 3 mod, now a standalone game. |
| War§ow | War§ow team | 2008 (January 19) | LIN, OSX, WIN | Qfusion id Tech 2 | GNU GPL (code), Proprietary license (media) | Quake style deathmatch focussed on high-paced action and trickjumps. |
| Wolfenstein: Enemy Territory | Activision, id, Splash Damage | 2003 (May 29) | LIN, OSX, WIN | id Tech 3 | Proprietary license | Former expansion pack turned freeware. WW2 multiplayer team combat |
| World of Padman | Padworld Entertainment | 2007 (April 1) | LIN, OSX, WIN | ioquake3 id Tech 3 | GNU GPL (code), Proprietary license (media) | A free Quake 3 like comical FPS game |
