Play with 10 different co-op partners for at least 15 minutes each.
Survive 15 consecutive waves with each of the 4 characters.
Complete act I with 4 different characters.
Survive wave 30.
Survive 30 consecutive waves with at least one co-op player.
Kill enemies of 6 different types during a single round.
Survive 5 waves in each of the 4 Arenas.
Survive 10 consecutive waves using only custom weapons.
Survive 15 consecutive waves using the analog combat controls.
Reach level 50.
Survive 5 waves using only your fists and legs.
Play any Arena in co-op.
Explore the entire island.
Find 120 collectibles.
Heal yourself with a medkit 100 times.
Loot 5 Exceptional Weapons.
Kill 100 enemies with Fury attacks.
Finish 75 quests cumulatively.
Set 5 enemies on fire and then kill them with explosives.
Set 10 zombies on fire simultaneously.
Customize 25 weapons.
Find 60 collectibles.
Kill 250 zombies using edged melee weapons.
Sever 100 limbs.
Kill 50 human enemies.
Kill 250 zombies using blunt melee weapons.
Kill 5 Infected in a row with a single blow.
Kill an Infected with a grenade blast.
Kill 250 zombies using firearms.
Drive a total distance of 10 kilometers.
Reach level 25.
Kill 250 zombies with modified weapons.
Kill 50 zombies using a vehicle.
Complete 25 quests while playing with at least one co-op partner.
Complete 5 quests with 3 co-op partners.
Kill 10 zombies in a row with headshots.
Create weapons to rival the gods of fire or thunder.
Play in a co-op team of 4 different playable characters.
Kill 150 enemies using Analog Fighting controls.
Travel a distance of 20 kilometers on foot.
Use a hammer to kill a series of 15 zombies without taking damage.
Breach a locked door with the first blow.
Reach level 10.
Kill a zombie with 10 different melee weapons.
Create a customized weapon.
Kill 25 zombies with your bare fists.
Complete 5 quests in a single co-op game with the same partners.
Join another player's game.
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