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Destroy 1000 Crates
Complete a level in Co-op
Complete the game in Extreme Mode
Collect all 8 hidden comic books
With Big Daddy, use the flashbang to stun 6 enemies at once.
With Kick-Ass, Kill 10 enemies during one rage activation.
With Hit Girl, Kill 2 enemies in one wall run attack.
Set off the security camera 5 times in one level.
Complete the game in Normal Difficulty
Find and kill the Junkyard King
Level up any one character to level 50.
Kill 1000 enemies
Light a Piano on fire in the Penthouse