Know this-the world of Left 4 Dead is in complete chaos. And you will understand this after only a few minutes in it. Zombies will come at you from every possible (and not-so-possible) direction, clawing at your eyes, hoping to gorge on your intestinal and brain matter. There is no safe way to play through this game. There is no cover. All you can hope for is a flashlight that works, a few rounds of ammo, and three grizzled survivors looking out for your neck.