Solve 85% of Riddler challenges

Catch a Batarang (any play mode)

Complete story mode on Easy difficulty

KO all the henchmen celebrating your arrival at the party

Solve 55% of Riddler challenges

Venture into Killer Croc's lair and come out alive

Defeat two Titan Henchmen at once

Capture and lock up Harley Quinn

Save Dr. Young from being killed by Victor Zsasz

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

Solve 10% of Riddler challenges

Survive the nightmare of the Scarecrow's fear gas

Complete a combo of 40 moves (any play mode)