Arma II is the latest realistic military sim from the original developers of Operation Flashpoint. If you've ever wondered what it's like to be solider, tank crewman or pilot in the military this is the game for you. Just don't forget to bring a sturdy pair of boots along with your flak jacket and assault rifle.

Left 4 Dead was one of the best games of 2008. Its premise was simple, but on harder difficulty levels, and in versus mode it's complex, challenging and competitive. Our huge guide looks at how to survive as a team - whether you want to save your hides or spill some brains.

Company of Heroes: Opposing Fronts is the new expansion pack from THQ which expands on the original game by letting players take over the British 2nd Army or the German Panzer Elite and wage war in two new campaigns.