Blind

Survive in the maze by slaying just a measly 10 zombies.

Do a little more than survive, show the zombies you mean business, that you can use a gun and not run your nose into the walls. 100 zombies slain.

The zombies pee them selves a bit when you enter the room. You are a class-A zombie slayer with over 1000 corpses on your zombie-corpse tower!