Defeat two Titan Henchmen at once

Unlocked: 20 Feb 2011 14:41:14

Solve 55% of Riddler challenges

Unlocked: 20 Feb 2011 14:27:33

Capture and lock up Harley Quinn

Unlocked: 18 Feb 2011 20:30:46

Solve 40% of Riddler challenges

Unlocked: 18 Feb 2011 20:00:41

Save Dr. Young from being killed by Victor Zsasz

Unlocked: 18 Feb 2011 19:36:17

Face your biggest fears and keep your sanity

Unlocked: 18 Feb 2011 19:29:15

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

Unlocked: 17 Feb 2011 19:53:35

Glide continuously for over 100m

Unlocked: 17 Feb 2011 19:51:09

Solve 25% of Riddler challenges

Unlocked: 17 Feb 2011 19:49:57

Defeat Bane

Unlocked: 17 Feb 2011 15:26:02

Survive the nightmare of the Scarecrow's fear gas

Unlocked: 17 Feb 2011 15:14:02

Save all the doctors in Medical

Unlocked: 16 Feb 2011 20:23:24

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

Unlocked: 16 Feb 2011 19:52:45

Solve 10% of Riddler challenges

Unlocked: 16 Feb 2011 19:52:04

Escape from Intensive Treatment to the island surface

Unlocked: 16 Feb 2011 19:28:24

Solve 5% of Riddler challenges

Unlocked: 15 Feb 2011 21:29:13

Survive the onslaught from the deformed Joker henchman

Unlocked: 15 Feb 2011 20:57:14

Complete a combo of 10 moves (any play mode)

Unlocked: 15 Feb 2011 20:39:37

Rescue the guards and henchman from the Joker toxin in Decontamination

Unlocked: 15 Feb 2011 17:27:45

Take down Zsasz in the Patient Pacification Chamber

Unlocked: 15 Feb 2011 17:20:18

Complete a combo of 5 moves (any play mode)

Unlocked: 15 Feb 2011 17:11:47

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

Complete story mode on Hard difficulty

Time to break up this party

Complete a combo of 20 moves (any play mode)

Complete a combo of 40 moves (any play mode)

Take on a beast in hand to hand combat

Catch a Batarang (any play mode)

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

Ride a beast and unleash its power

Achieve 8 medals on combat challenges

Achieve 16 medals on combat challenges

Achieve 24 medals on combat challenges

Achieve 8 medals on predator challenges

Achieve 16 medals on predator challenges

Achieve 24 medals on predator challenges

Complete one predator challenge by using only Silent Takedowns and without being detected

Complete one combat challenge without taking damage

Solve every riddle on the island

Solve 70% of Riddler challenges

Solve 85% of Riddler challenges

Solve Arkham's biggest mystery

100% Complete