Save all the doctors in medical

Complete a combo of 20 moves (any play mode)

Solve 5% of riddler challenges

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

Rescue the guards and henchman from the Joker toxin in Decontamination

Complete a combo of 10 moves (any play mode)

Complete A Mission In Co-Op Mode (Any Difficulty Level)

Complete Mission 1 (Any Difficulty Level)

Complete all levels on Veteran difficulty

Clear all missions of any rank consecutively using the same gun parts.

Complete all levels on Experienced difficulty

Sink an Acemarine

Unlock all parts