Counter-Strike - Counter-Strike is a PC-exclusive FPS video game developed by Valve Corporation.
Left 4 Dead 2 - Left 4 Dead 2 remains the co-operative zombie adventure with all new characters, locations, enemies and also weapons to change in the popular game-play introduced in the unique Left 4 Dead.
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
Dead Frontier - Dead Frontier is among the few zombie based video games that you can obtain in your web browser and for free.
Rage - Rage Software, also Rage Games and FX Digital Network, was a British video game developer.
Call of Duty: Black Ops - Call of Duty: Black Ops is an Action, Single-pl, and Multiplayer First-person Shooting video game developed by Treyarch and published by Activision.