Solve every riddle on the island

Solve 70% of Riddler challenges

Complete story mode on Easy difficulty

KO all the henchmen celebrating your arrival at the party

Glide continuously for over 100m

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

Venture into Killer Croc's lair and come out alive

Defeat two Titan Henchmen at once

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

Capture and lock up Harley Quinn

Save Dr. Young from being killed by Victor Zsasz

Gain access to Arkham Mansion after it is locked down by the Joker

Solve 10% of Riddler challenges