|Big head mode|
Hold L1 + R1 and rotate the Left Analog-stick counterclockwise and Right Analog-stick clockwise. Repeat the code to disable its effect.
New Game Plus mode
Successfully complete the game under the Normal or Hard difficulty setting. This mode allows you to keep your previously earned gadgets and experience points. Also, there will not be any counter icons on thugs, thugs will be more difficult from the start, thugs will have different configurations, and Bosses will be tougher.
* Find the coordinates X700.00, Y490.00 on the Cryptographic Sequencer to intercept a radio frequency that contains the following repeating numbers: 9, 23, 9, 12, 12, 18, 5, 20, 21, 18, 14, 2, 1, 20, 13, 1, 14. The message is decoded as "I WILL RETURN BATMAN".
* Find the coordinates X500.00, Y900.00 on the Cryptographic Sequencer to intercept a radio frequency that contains the following repeating numbers: 5, 15, 9, 7, 21, 18, 18, 14, 3, 5, 24, 15, 12, 7, 22, 3, 10, 5, 15, 9, 22, 3, 8, 25, 26, 15, 16, 25, 10, 15, 17, 25. The message is decoded as "YOU WILL PAY FOR WHAT YOU HAVE DONE TO ME".
* The last radio transmission contains the numbers: 3, 20, 26, 18, 26, 16, 24, 1, 11, 4, 24, 9, 3, 8, 5, 2, 12, 18, 6, 16, 7, 11, 3, 10, 17, 5, 13, 4, 21, 8. The message is decoded as "FEAR WILL TEAR GOTHAM CITY TO SHREDS".
Complete the following tasks to unlock PlayStation3 trophy rewards.
Platinum (Platinum): Congratulations.
I'm Batman (Bronze): Become the Bat.
Acid Bath (Bronze): Save the damsel, but is she in distress?
Savior (Bronze): Save the medical volunteers.
Chimney Sweep (Bronze): There is only one way in.
One-Armed Bandit (Bronze): Hammer the point home.
Communication Breakdown (Bronze): Clear the airwaves.
Gladiator (Bronze): Last man standing.
Wrecking Ball (Silver): Stop the unstoppable.
Lost And Found (Bronze): Uncover the secret of Arkham City.
Sandstorm (Silver): We are legion.
Hide And Seek (Silver): A deadly game of hide and seek.
Ghost Train (Silver): Fight for survival.
Freefall (Bronze): Don't look down.
Exit Stage Right (Silver): All the world is a stage.
Forensic Expert (Bronze): Collect enough evidence to locate the gun for hire.
Contract Terminated (Silver): Stop the contract operative.
Serial Killer (Silver): Track down the serial killer.
Mystery Stalker (Bronze): Reveal the mystery watcher.
Distress Flare (Bronze): Answer the call for help.
Broken Toys (Silver): Destroy it all.
Ring Ring (Bronze): Answer a ringing phone.
Dial Z For Murder (Silver): Stop the phone booth killer.
Stop the Clock (Bronze): Time is running out.
Bargaining Chip (Bronze): Reunite the separated couple.
AR Knight (Silver): Complete all augmented reality training exercises.
Fully Loaded (Bronze): Collect all of Batman's gadgets and upgrades.
Aggravated Assault (Bronze): Stop all assaults in Arkham City.
IQ Test (Bronze): Solve the first riddle.
Conundrum (Bronze): Rescue the first hostage from Riddler.
Mastermind (Bronze): Rescue the second hostage from Riddler.
Puzzler (Bronze): Rescue the third hostage from Riddler.
Intellectual (Bronze): Rescue the fourth hostage from Riddler.
Brainteaser (Silver): Rescue the fifth hostage from Riddler.
Genius (Silver): Rescue all the hostages from Riddler.
Bronze Revenge (Bronze): Obtain 24 medals on the original Arkham City ranked maps (as Batman).
Silver Revenge (Bronze): Obtain 48 medals on the original Arkham City ranked maps (as Batman).
Gold Revenge (Silver): Obtain all 72 medals on the original Arkham City ranked maps (as Batman).
Campaign Bronze (Bronze): Obtain 36 medals on the original Arkham City campaigns (as Batman).
Campaign Silver (Bronze): Obtain 72 medals on the original Arkham City campaigns (as Batman).
Campaign Gold (Silver): Obtain all 108 medals on the original Arkham City campaigns (as Batman).
Flawless Freeflow Fighter 2.0 (Bronze): Complete one combat challenge without taking damage (any character).
Twice Nightly (Silver): Complete New Game Plus.
Gotham Base Jumper (Bronze): Jump off the tallest building in Arkham City and glide for 1 minute without touching the ground..
Pay Your Respects (Bronze): A moment of remembrance.
Storyteller (Bronze): Have 12 murderous dates with Calendar Man.
Catch (Bronze): Find someone to play remote Batarang catch with.
50x Combo (Bronze): Complete a combo of 50 moves (any play mode, any character).
Perfect Freeflow 2.0 (Bronze): Perform a perfect combo including all of Batman's combat moves (any play mode).
Gadget Attack (Bronze): Use 5 different Quickfire gadgets in one fight (any play mode).
Perfect Knight - Day 2 (Gold): Complete every challenge in Arkham City - Main Story, Side Missions, Upgrades, Collectables, New Game Plus and Riddlers Revenge (as Batman).