Defeat 30 enemies with the T-Bolt Sniper

Shoot down a flying Hawk with the Ox Heavy Tank.

Create a customized weapon.

Kill an enemy with the A.R.M.

Complete act II.

Kill 250 zombies using blunt melee weapons.

Sever 100 limbs.

Complete 5 quests in a single co-op game with the same partners.

Play with 10 different co-op partners for at least 15 minutes each.

Kill a zombie with 10 different melee weapons.

Travel a distance of 20 kilometers on foot.

Drive a total distance of 10 kilometers.