Achieve 8 medals on combat challenges

Perform a perfect combo including all of Batman's combat moves (any play mode)

Solve every riddle on the island

Solve 70% of Riddler challenges

Complete story mode on Normal difficulty

Complete story mode on Hard difficulty

Defeat the giant Titan Ivy plant

Complete a combo of 40 moves (any play mode)

Venture into Killer Croc's lair and come out alive

Catch a Batarang (any play mode)

Defeat two Titan Henchmen at once

Capture and lock up Harley Quinn

Save Dr. Young from being killed by Victor Zsasz