Quake - Quake is a series of first-person shooter video games released by id Software.
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
Hexen II - The Hammer of Thyrion project is a cross-platform source port effort of Raven Software's Hexen.
DotA 2 - Dota 2 is a Free-to-play, Action-Adventure, Multiplayer Online Battle Arena, Single and Multiplayer video game created and published by Valve Corporation.
BioShock - Get the latest information on BioShock, BioShock 2, and BioShock Infinite
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.