Kill 100 zombies in total
Kill 10,000 zombies in total
Kill 1000 zombies in total
Kill a zombie brute
Kill 10 zombie brutes
Kill 10 zombies with one grenade
Kill 100 zombie brutes
Kill 30 zombies with one air strike
Have a survivor of at least level 10
Have at least 1000 Z Bucks at the beginning of a wave
Have all 5 survivors equipped with legendary weapons
Have at least 10,000 Z Bucks at the beginning of a wave