Your forces were out on a routine patrol and the undead were suddenly everywhere! Your forces were badly depleted in the conflict thus you must continue to do your job and keep the undead population under control until a solution can be found.
One man alone against the raving hordes of zombies. They come crawling, running, jumping and all you have to do is load your shotgun and blast them to pieces!
Experience sniping action with many types of rifles, bloody body parts, better collision detection and tons of zombies. Escort the VIP to a safe zone for extraction.