If you like killing zombies you should definitely try Zombie Killing Spree, a cool top-down upgrade shooting game. Control the brave character through dangerous levels full of blood-thirsty undeads and kill them all before they get you. The shooter will automatically shoot the attackers, your task is to keep him away from danger and keep looking for those rotten bastards. After every level you will be able to upgrade your character, and once you have completed all stages, a new weapon will be unlocked for you to start another Zombie Killing Spree. Enjoy!