Lovers of the undead would have to get their zombie fix from Turtle Rock Studios, Certain Affinity, and Valve Corporation's upcoming Left 4 Dead (Microsoft Xbox 360, PC) and from the looks of it, we can safely say that's a good thing. The squad-based shooter is definitely shaping up to impress even if the Source engine is showing its age, and we've got a video to prove it.

Unlike typical zombies, the infected creeps in Left 4 Dead can actually run fast. There's no need to worry though, because you and three others can be armed with shotguns, sub-machine guns, rifles, and even dual-wield handguns. You'll see how efficient these weapons are in Left 4 Dead by watching the embed below.