Brace yourselves, zombies are coming! Zombie outbreak right in your city, what a disaster. Do not be afraid of a danger, be a hero and save your city! Get behind that cannon, and start shooting before they reach your defenses. Shoot down zombies as they crawl towards you, otherwise they will eat you alive. This is not a joke! Try to get the best possible score, so you can unlock as many upgrades as possible (there is a laser one...). Have fun.