No missable achievements (plus 21 unknown)
Sign in with Steam or Xbox to track your progress, and:
Complete a challenge
Blow the factory gates!
Interrogate the sniper
Take out the weapons train
Upgrade 1 character completely
Use each weapon in the game to kill an enemy
Complete chapter 1
Complete chapter 2
Complete chapter 3
Complete chapter 4
Complete all Challenges
Complete the Campaign on Casual difficulty
Heal 50 times
Kill 50 enemies in a single combo
Complete a mission on Hardcore without getting healed
Perform all grab moves, melee attacks and signature kills
Upgrade all characters and signature weapons
Play through an entire chapter with 4 player co-op
Complete the Campaign on Hardcore difficulty
Perform all 4 fully upgraded grab moves
Kill 2000 enemies using melee attack or grabs