String up one henchman and drop him to surprise a second (any play mode)

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

Solve 25% of Riddler challenges

Defeat Bane

Save all the doctors in Medical

Solve 5% of Riddler challenges

Survive the onslaught from the deformed Joker henchman

Take down Zsasz in the Patient Pacification Chamber

Install every weapon upgrade.

Pick up a Marker fragment for the first time.

Complete Chapter 12 on any difficulty setting.

Kill 30 enemies with the Contact Beam.