Return of the Dynamic Duo.

Obtain a key by completing the seventh Riddler trial.

Deploy the Cloudburst countermeasures.

Obtain a key by completing the fifth Riddler trial.

Obtain a key by completing the third Riddler trial.

Complete every challenge in Arkham City - Main Story, Side Missions, Upgrades, Collectables, New Game Plus and Riddler's Revenge (as Batman)

Retrieve your stolen goods

Obtain all 108 medals on the original Arkham City campaigns (as Batman)

Obtain 36 medals on the original Arkham City campaigns (as Batman)

Obtain 48 medals on the original Arkham City ranked maps (as Batman)

Complete one combat challenge without taking damage (any character)

Complete all 40 of the Catwoman Riddler grid items