Heal 50 times
Perform all grab moves, melee attacks and signature kills
Use each weapon in the game to kill an enemy
Take out the weapons train
Interrogate the sniper
Blow the factory gates!
Complete a challenge
Complete the Campaign on Casual difficulty
Complete the Campaign on Hardcore difficulty
Play through an entire chapter with 4 player co-op
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
Kill 2000 enemies using melee attack or grabs
Complete chapter 1
Complete chapter 2
Complete chapter 3
Complete chapter 4