Left 4 Dead Episode 4: Blood Harvest

Zombies lurk behind every tree, over every hilltop and behind every shadow in this terrifying moonlit search for a rumored evacuation zone to the north: several acres of back-country farmland taken over by the military to get the last of humanity out of Ground Zero. Plunge through pitch-black forests, stumble blindly through fields of swaying corn, and take aim at the silhouettes leaping at you from the darkness-all towards finding a hold-out that might already have been abandoned to the horde.