Heal yourself with a medkit 100 times.

Kill 50 human enemies.

Customize 25 weapons.

Kill 5 Infected in a row with a single blow.

Get all wheels of your car into the air for at least 20 meters and then touch the ground again.

Play any Arena in co-op.

Complete the game on Normal

Kill 100 enemies with Fury attacks.

Reach level 25.

Kill 250 zombies using edged melee weapons.

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

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

Sever 100 limbs.