Deathmatch, although very simplified, similar to Far Cry and Crysis, with decor elements destructible. Graphic detail is customizable, resolution in window mode or full screen.
Left click for Shooting and right click for Zooming. Use Arrows to move around, 'R' to reload your weapon and 'G' to throw a grenade. You can also Chat with your team by pressing 'U' ('Enter' to chat with everybody).