You killed 100 zombies in story mode.
You killed 500 zombies in story mode.
You killed 1000 zombies in story mode.
You killed the undead butcher.
You killed the necromancer.
You killed the evil spirit.
You bought and upgraded all guns and abilities to the max in story mode.
You finished the story mode.
You finished the story mode in hard difficulty.
You killed 500 zombies using only the base gun or the machine gun in survival mode.
You killed 500 zombies using only the flamethrower in survival mode.
You killed 500 zombies using only the ice gun in survival mode.
You killed 500 zombies using only the explosive gun in survival mode.
You killed 1000 zombies using only the holy beam in survival mode.
You killed 500 zombies using only the air slash in survival mode.
You shook off 100 zombies in survival mode.
You bought all possible upgrades for all the weapons in survival mode.
You upgraded all of your Nun's abilities in survival mode.
You finished the survival mode.
You finished the survival mode in hard difficulty.