Kill 50 human enemies.

Kill 25 zombies with your bare fists.

Drive a total distance of 10 kilometers.

Kill 250 zombies using blunt melee weapons.

Reach level 25.

Sever 100 limbs.

GTA Online: You completed a Heist Setup mission.

GTA Online: Finish a Gang Attack without dying and kill at least 10 enemies.

Create weapons to rival the gods of fire or thunder.

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

Reach level 10.

Kill a zombie with 10 different melee weapons.