Arma - Experience true combat gameplay in a massive military sandbox.
Quake - Quake is a series of first-person shooter video games released by id Software.
Warframe - Ninjas Play Free.
Call of Duty - Call of Duty is a first-person and third-person shooter series by Infinity Ward.
System Shock - System Shock developed by Night Dive Studios.
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.