Complete story mode on Hard difficulty

Unlocked: 14 Aug 2011 00:31:24

Complete story mode on Normal difficulty

Unlocked: 14 Aug 2011 00:31:23

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

Unlocked: 03 Aug 2011 06:40:37

100% Complete

Unlocked: 03 Aug 2011 01:50:26

Achieve 24 medals on predator challenges

Unlocked: 03 Aug 2011 01:50:24

Achieve 16 medals on predator challenges

Unlocked: 02 Aug 2011 19:35:36

Achieve 8 medals on predator challenges

Unlocked: 02 Aug 2011 18:33:13

Achieve 24 medals on combat challenges

Unlocked: 02 Aug 2011 08:36:31

Achieve 16 medals on combat challenges

Unlocked: 02 Aug 2011 08:02:56

Achieve 8 medals on combat challenges

Unlocked: 31 Jul 2011 18:50:27

Complete story mode on Easy difficulty

Unlocked: 31 Jul 2011 18:44:27

Time to break up this party

Unlocked: 31 Jul 2011 18:34:40

Complete a combo of 40 moves (any play mode)

Unlocked: 31 Jul 2011 18:34:20

Solve Arkham's biggest mystery

Unlocked: 31 Jul 2011 18:29:25

Solve every riddle on the island

Unlocked: 31 Jul 2011 18:28:05

Solve 85% of Riddler challenges

Unlocked: 31 Jul 2011 17:15:52

Solve 70% of Riddler challenges

Unlocked: 31 Jul 2011 05:17:18

Solve 55% of Riddler challenges

Unlocked: 31 Jul 2011 04:01:23

Defeat the giant Titan Ivy plant

Unlocked: 31 Jul 2011 03:46:26

Ride a beast and unleash its power

Unlocked: 31 Jul 2011 02:52:57

Venture into Killer Croc's lair and come out alive

Unlocked: 30 Jul 2011 16:50:16

Solve 40% of Riddler challenges

Unlocked: 30 Jul 2011 16:33:27

Conquer the effects of the Scarecrow's fear gas

Unlocked: 30 Jul 2011 16:29:05

Save Dr. Young from being killed by Victor Zsasz

Unlocked: 27 Jul 2011 18:20:54

Face your biggest fears and keep your sanity

Unlocked: 27 Jul 2011 18:14:41

Complete one combat challenge without taking damage

Unlocked: 27 Jul 2011 07:44:04

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

Unlocked: 27 Jul 2011 07:33:27

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

Unlocked: 27 Jul 2011 06:43:23

Defeat Bane

Unlocked: 26 Jul 2011 20:41:47

Solve 10% of Riddler challenges

Unlocked: 26 Jul 2011 20:31:17

Survive the nightmare of the Scarecrow's fear gas

Unlocked: 26 Jul 2011 20:23:44

Take down Zsasz in the Patient Pacification Chamber

Unlocked: Offline

Rescue the guards and henchman from the Joker toxin in Decontamination

Unlocked: Offline

Survive the onslaught from the deformed Joker henchman

Unlocked: Offline

Escape from Intensive Treatment to the island surface

Unlocked: Offline

Save all the doctors in Medical

Unlocked: Offline

Capture and lock up Harley Quinn

Unlocked: Offline

Defeat two Titan Henchmen at once

Unlocked: Offline

Complete a combo of 20 moves (any play mode)

Unlocked: Offline

Glide continuously for over 100m

Unlocked: Offline

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

Unlocked: Offline

Take on a beast in hand to hand combat

Unlocked: Offline

Catch a Batarang (any play mode)

Unlocked: Offline

Complete a combo of 5 moves (any play mode)

Unlocked: Offline

Complete a combo of 10 moves (any play mode)

Unlocked: Offline

Solve 5% of Riddler challenges

Unlocked: Offline

Solve 25% of Riddler challenges

Unlocked: Offline