Games similar to Combat Arms include Xonotic, which is free and open source. Other options are Counter-Strike, Quake, Doom and AssaultCube. You're spoiled for choice with First-Person Shooters like Combat Arms: we list more than 50 alternatives for Windows, Mac, Linux, Android and iPhone.
Day of Defeat: Source features multiplayer, team-based gameplay set in the WWII European theatre of operations. Players choose a role and tackle goal-oriented missions based on historical operations.
Zandronum is a multiplayer oriented port, based off Skulltag, for Doom and Doom II by id Software.
Developed by id® Software, the creators of DOOM® and QUAKE®, RAGE is a groundbreaking first-person shooter set in the not-too-distant future after an asteroid impacts Earth, leaving a ravaged world behind.
United States
TrueCombat: Elite is a FREE modification for the Enemy Territory game (also free). It is a realistic modern day FPS featuring state of the art models and textures.
Aliens vs. Predator is a science fiction first-person shooter video game, developed by Rebellion Developments
Japan
Squad is a 50 vs 50 multiplayer first-person shooter that aims to capture combat realism through communication and teamplay.
Canada
Ravenfield is a singleplayer battlefield style game. It started out as an experiment with ragdolls and AI, and will remain a slightly experimental, for-fun game project.
United States
A 6 vs 6 first person shooter, Gotham City Impostors is a multiplayer game unlike any other, giving players the opportunity to rebel against conformity as they customize their own characters. Posing as amateur vigilantes or villains, gamers will create their very own Bats and...
United States
Take flight as a winged warrior in the middle of a massive war in Aion, a stunning massively multiplayer online roleplaying game where abundant solo adventures, intriguing epic group quests, challenging dungeons, and massive Legion raids hone your battle skills as you ascend to...
South Korea
A video game based on the ABC television series Lost that was released for the PC, Xbox 360 and PlayStation 3 on February 26, 2008. The game was officially unveiled at Comic-Con 2007.
France
EU