Catch a Batarang (any play mode)

Complete story mode on Normal difficulty

KO all the henchmen celebrating your arrival at the party

Solve every riddle on the island

Defeat the giant Titan Ivy plant

Complete a combo of 20 moves (any play mode)

Venture into Killer Croc's lair and come out alive

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

Defeat two Titan Henchmen at once

Capture and lock up Harley Quinn

Face your biggest fears and keep your sanity

Gain access to Administration after it is locked down by the Joker