Complete one combat challenge without taking damage (any character)

Obtain 24 medals on the original Arkham City ranked maps (as Batman)

Reach x50 Combo in the Main Story

Use the Batwing to travel to all Fast Travel points

Capture all of Black Mask's Assassins

Complete a Most Wanted entry

Glide across Bridge without touching ground

Who is the Joker?

Ram and destroy 5 boats in under 2 minutes with your longship (Base game only)

Get thrown 30 meters away by a destroyer or a housecarl

Assassinate 10 enemies in a row without triggering a conflict

Complete all Roman collector challenges