AstroMenace - Cross-platform and open-source 3D space shooter with spaceship upgrades.
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
Battle of the Brands - Compare the online awareness of 2 brands in a battle
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Dash Quest - Dash Quest is an Adventure and Single-player Role-playing video game developed by Tiny Titan Studios for Mobile Devices.
Unreal Tournament - Unreal is a series of first-person shooter video games developed by Epic Games.