Kill 5 zombies by using an axe.
Kill 5 zombies by using a pistol.
Kill 30 zombies by using a mini machine gun.
Kill 20 zombies by using a shotgun.
Kill 50 zombies by using a machine gun
Kill 30 zombies by using a grenade launcher.
Kill 50 zombies by using a katana.
Kill 100 zombies in a game.
Kill 50 zombies by using a fire gun.
