Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Sniper Elite V2 - Sniper Elite V2 is a Fantastic, Action-Adventure, Stealth, Co-op, WWII, First and Third-person Shooter, Tactical, Single and Multiplayer video game created and published by Rebellion.
Rage - Rage Software, also Rage Games and FX Digital Network, was a British video game developer.
Warface - Warface - is a free online shooter with diverse PVP modes, exciting PVE missions, outstanding arsenal and millions of fans around the world!