Kill 100 zombies in story mode.

Kill 500 zombies in story mode.

Kill 1000 zombies in story mode.

Defeat the undead butcher.

Defeat the necromancer.

Defeat the evil spirit.

Buy and upgrade all guns and abilities to the max in story mode.

Finish the story mode.

Finish the story mode in hard difficulty.

 

Kill 500 zombies using only the base gun or the machine gun in survival mode.

Kill 500 zombies using only the flamethrower in survival mode.

Kill 500 zombies using only the ice gun in survival mode.

Kill 500 zombies using only the explosive gun in survival mode.

Kill 1000 zombies using only the holy beam in survival mode.

Kill 500 zombies using only the air slash in survival mode.

Shake off 100 zombies in survival mode.

Buy all possible upgrades for all the weapons in survival mode.

Upgrade all of your Nun's abilities in survival mode.

Finish the survival mode.

Finish the survival mode in hard difficulty.