Kill an Infected with a grenade blast.

Loot 5 Exceptional Weapons.

Set 10 zombies on fire simultaneously.

Customize 25 weapons.

Use a large medkit to heal an injury of 5% or less.

Find 120 collectibles.

Kill 150 enemies using Analog Fighting controls.

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

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

Complete act IV.

Create weapons to rival the gods of fire or thunder.

Save 5 people besieged by zombies.

Find 60 collectibles.