Explode 3 propane gas tanks within a 10-second period

Collect a total of 50 achievements

Survive 5 minutes with health staying below 25%

Pick up 10 health power-ups in one game when your health is at 100%

While cloaked, kill 250 zombies in one game

Kill any boss within 30 seconds of the boss appearing

Reach wave 2 in warehouse barricade without any zombie breaching the fence perimeter

In an On-line Coop game, perform three revivals in a single game

In an On-line Coop game, stay within reaching distance of another player while not taking damage for 30 seconds

Fire 10000 bullets in Free Play, Barricade or Survival mode while not receiving any zombie damage

Get the minigun and kill 50 zombies with it inside 9 seconds

Reach Wave 8 in Bridge Barricade mode

In one game, kick a zombie after that same zombie hurt you and repeat 20x

Kill the minigun zombie boss

Complete all missions at 5 bronze-star difficulty

Complete any mission on 3 silver-star level using only the default Glock

In one game kill 2 bosses using the Dual Glocks

Complete the Walker mission on any silver or gold star level

Engage DOA mode in single player Free Play, then kill 50 zombies during a single DOA ghost powerup

Kill 100 zombies stunned by flashbangs in one game

Set 250 zombies on fire with the incendary rounds in a single game

Kill 250 zombies with the rage powerup in one game

Complete all missions on 5 silver-star level

Complete all missions on 5 gold-star level