Warp to Hell

Earn the Mastery for a weapon mod

Detonate 3 explosive chests on the pillars in Alpine Ridge

Unlock the strong chest in Doctor Shemp

Flame every Vulture in Cliff Town

Flame 10 sheep in Stone Hill

Perform 200 Glory Kills

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

Survive 30 consecutive waves with at least one co-op player.

Set 10 zombies on fire simultaneously.

Kill 250 zombies using firearms.

Play any Arena in co-op.

Kill 10 zombies in a row with headshots.