Borderlands - Borderlands is a science fiction first-person shooter with RPG elements made with cel-shaded...
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
Bulletstorm - In this sci-fi first person shooter, players take on the role of mercenary Grayson Hunt in an attempt to get off a hostile alien planet and get a little bit of vengeance along the way.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Urban Terror - Urban Terror started as a realism based "total conversion" mod for Quake III Arena.
Unreal Tournament - Unreal is a series of first-person shooter video games developed by Epic Games.