WorthPlaying writes: "I came back from an EA event last year raving about Left 4 Dead. Using the Source engine, it creates the kind of zombie apocalypse that a lot of gamers, including myself, have been looking for. You're set down in the middle of a massive horde of fast-moving, angry zombies and left on your own.
You and three of your friends, using limited resources, must shoot your way through an undead-choked environment to (increasingly dubious) safety. You can carry one large gun, up to two pistols, one first-aid kit, a bottle of painkillers, and one explosive of some kind, such as the recently added Molotov cocktails or a pipe bomb that attracts nearby zombies to it before it explodes."