Complete a level in Co-op

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.

Find and kill the Junkyard King

Level up any one character to level 50.

Light a Piano on fire in the Penthouse