Save the medical volunteers

Become the Bat

Complete story mode on Easy difficulty

KO all the henchmen celebrating your arrival at the party

Complete a combo of 20 moves (any play mode)

Solve 25% of Riddler challenges

Conquer the effects of the Scarecrow's fear gas

Capture and lock up Harley Quinn

Face your biggest fears and keep your sanity

Gain access to Arkham Mansion after it is locked down by the Joker

Solve 5% of Riddler challenges

Save all the doctors in Medical

Escape from Intensive Treatment to the island surface