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

Solve 85% of riddler challenges

Ride Titan henchman and knock down 10 thugs (any play mode)

Conquer the effects of the Scarecrow's fear gas

Defeat two Titan Henchmen at once

Capture and lock up Harley Quinn

Save Dr. Young from being killed by Victor Zsasz

Build and save a level with more than one player with the thermometer more than 30% full

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