Complete one combat challenge without taking damage (any character)

Retrieve your stolen goods

Complete all 40 of the Catwoman Riddler grid items

Reveal the mystery watcher

Rescue the fourth hostage from Riddler

Stop all assaults in Arkham City

Collect all of Batman's gadgets and upgrades

Collect enough evidence to locate the gun for hire

Stop the phone booth killer

Complete 10 tactical objectives.

Don't look down

Fight for survival

Complete a combo of 50 moves (any play mode, any character)