Achievements
     Complete  each achievement to get the allotted gamerscore. If you
have an Xbox 360 gamertag, you can log in using this same gamertag and
the  achievements  will  count the same as if you were playing the 360
version.

Arkham Analyst (20):               Solve 5% of Riddler challenges

Baneful Payback (25):              Defeat Bane

Big Bang (50):                     Complete story mode 
                                   on Easy difficulty

Bigger Bang (50):                  Complete story mode 
                                   on Normal difficulty

Biggest Bang (50):                 Complete story mode 
                                   on Hard difficulty

Born Free (10):                    Escape from Intensive Treatment 
                                   to the island surface

Breaking And Entering (10):        Gain access to Arkham Mansion 
                                   after it is locked down by the Joker

Catch! (5):                        Catch a Batarang (any play mode)

Conundrum Cracker (20):            Solve 55% of Riddler challenges

Crack The E Nigma (20):            Solve every riddle on the island

Crocodile Tears (50):              Venture into Killer Croc's lair 
                                   and come out alive

Cryptic Investigator (20):         Solve 10% of Riddler challenges

Daydreamer (10):                   Survive the nightmare of 
                                   the Scarecrow's fear gas

Double Trouble (25):               Defeat two Titan Henchmen at once

Flawless Freeflow Fighter (10):    Complete one combat challenge 
                                   without taking damage

Freakshow Rodeo (10):              Ride a beast and unleash its power

Freeflow Bronze (10):              Achieve 8 medals on combat challenges

Freeflow Combo 10 (5):             Complete a combo of 10 moves 
                                   (any play mode)

Freeflow Combo 20 (10):            Complete a combo of 20 moves 
                                   (any play mode)

Freeflow Combo 40 (10):            Complete a combo of 40 moves 
                                   (any play mode)

Freeflow Combo 5 (5):              Complete a combo of 5 moves 
                                   (any play mode)

Freeflow Gold (50):                Achieve 24 medals on combat challenges

Freeflow Perfection (10):          Perform a perfect combo including 
                                   all of Batman's combat moves 
                                   (any play mode)

Freeflow Silver (25):              Achieve 16 medals on combat challenges

Invisible Predator (10):           Complete one predator challenge 
                                   by using only Silent Takedowns 
                                   and without being detected

Just What The Doctors 
Ordered (10):                      Save all the doctors in Medical

Lateral Thinker (20):              Solve 25% of Riddler challenges

Leave No Man Behind (10):          Rescue the guards and henchman 
                                   from the Joker toxin in Decontamination

Malpractice Needs 
More Practice (10):                Survive the onslaught 
                                   from the deformed Joker henchman

Mano-A-Mano (10):                  Take on a beast in hand to hand combat

Mental Athlete (20):               Solve 70% of Riddler challenges

Mystery Solver (20):               Solve 40% of Riddler challenges

Night Glider (5):                  Glide continuously for over 100m

Party Pooper (10):                 Time to break up this party

Perfect Knight (75):               100% Complete

Poisoned Ivy (50):                 Defeat the giant Titan Ivy plant

Predator Bronze (10):              Achieve 8 medals on predator challenges

Predator Gold (50):                Achieve 24 medals on predator 
                                   challenges

Predator Silver (25):              Achieve 16 medals on predator 
                                   challenges

Recurring Nightmare (10):          Face your biggest fears 
                                   and keep your sanity

Resist The Fear (50):              Conquer the effects of the Scarecrow's 
                                   fear gas

Riddle Resolver (20):              Solve 85% of Riddler challenges

Rope-A-Dope-A-Dope (10):           String up one henchman and drop him 
                                   to surprise a second (any play mode)

Shocking Rescue (10):              Take down Zsasz 
                                   in the Patient Pacification Chamber

Solitary Confinement (25):         Capture and lock up Harley Quinn

World's Greatest Detective (20):   Solve Arkham's biggest mystery

Zsasz Cut Down To Size (10):       Save Dr. Young from being killed 
                                   by Victor Zsasz