Complete 25 quests while playing with at least one co-op partner.

Kill 250 zombies using blunt melee weapons.

Complete act I.

Use a hammer to kill a series of 15 zombies without taking damage.

Survive 5 waves using only your fists and legs.

Drive a total distance of 10 kilometers.

Kill 250 zombies using edged melee weapons.

Kill 100 enemies with Fury attacks.

Create weapons to rival the gods of fire or thunder.

Travel a distance of 20 kilometers on foot.

Kill a zombie with 10 different melee weapons.

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

Kill 250 zombies with modified weapons.