Play through an entire chapter with 4 player co-op
Complete chapter 1
Use each weapon in the game to kill an enemy
Blow the factory gates!
Take out the weapons train
Interrogate the sniper
Complete a challenge
Complete the Campaign on Casual difficulty
Kill 2000 enemies using melee attack or grabs
Complete chapter 2
Complete chapter 3
Complete chapter 4
Heal 50 times
Upgrade 1 character completely
Complete the Campaign on Hardcore difficulty
Upgrade all characters and signature weapons
Perform all grab moves, melee attacks and signature kills
Complete all Challenges
Complete a mission on Hardcore without getting healed
Kill 50 enemies in a single combo
Perform all 4 fully upgraded grab moves
