Batman: Return to Arkham - Arkham Asylum

Take down Zsasz in the Patient Pacification Chamber

Rescue the guards and henchman from the Joker toxin in Decontamination

Survive the onslaught from the deformed Joker henchman

Escape from Intensive Treatment to the island surface

Save all the doctors in Medical

Survive the nightmare of the Scarecrow's fear gas

Defeat Bane

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

Face your biggest fears and keep your sanity

Save Dr. Young from being killed by Victor Zsasz

Capture and lock up Harley Quinn

Defeat two Titan Henchmen at once

Conquer the effects of the Scarecrow's fear gas

Venture into Killer Croc's lair and come out alive

Defeat the giant Titan Ivy plant

Complete story mode on Easy difficulty

Complete story mode on Normal difficulty

KO all the henchmen celebrating your arrival at the party

Complete a combo of 20 moves (any play mode)

Glide continuously for over 100m

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

Defeat Titan henchman without using Batarangs (any play mode)

Catch a Batarang (any play mode)

Complete a combo of 5 moves (any play mode)

Complete a combo of 10 moves (any play mode)

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

Solve every riddle on the island

Solve 5% of Riddler challenges

Solve 10% of Riddler challenges

Solve 25% of Riddler challenges

Solve 40% of Riddler challenges

Solve 55% of Riddler challenges

Solve 70% of Riddler challenges

Solve 85% of Riddler challenges

Spirit of Amadeus Arkham revealed