Dismember 20 Limbs

Complete story mode on Easy difficulty

Defeat the giant Titan Ivy plant

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

Solve 25% of riddler challenges

Face your biggest fears and keep your sanity

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

Survive the nightmare of the Scarecrow's fear gas

Solve 10% of riddler challenges

Escape from Intensive Treatment to the island surface

Rescue the guards and henchman from the Joker toxin in Decontamination