Uncover the secret of Arkham City

Stop the unstoppable

Rescue the guards and henchman from the Joker toxin in Decontamination

Complete a combo of 5 moves (any play mode)

Clear the airwaves

Drop in on an old friend

There is only one way in

Answer a ringing phone

Perfect Dodge 10 attacks

Take a Selfie on the Hall of Selfies

Complete your first holocard set.

Completed Chapter 5 of Episode 1