Big Head Mode
Take out your cryptographic sequencer. Once out, hold both triggers, and rotate your sticks in opposite directions. After a while you'll have a big head. Your enemies will also have a big head.
Contributed By: Keverlasting.
Play in any costume, even before finishing the game.
To unlock this, simply press the following combination on the Main Menu screen (after you have selected your save slot): - Left, Left, Down, Down, Left, Left, Right, Up, Up, Down. You will get an audio confirmation and when you continue your game, you will get the option to select your favorite skin.
Contributed By: templar393.
New Game+ allows you to play through the story again on a harder difficulty with all of the tools you already acquired in your first game. Note that this will not prevent you from playing your original save as well -- the New Game+ is separate.
Unlockable How to Unlock New Game+ Beat the story mode on Normal or Hard difficulty.
Contributed By: DDJ.
Cryptographic Sequencer Cipher (SPOILERS)
If you open up your Cryptographic Sequencer, you can find three broadcasts from a slightly fuzzy and robotic voice saying seemingly random numbers. These numbers are actually a cipher, numeric representations of the alphabet. Two of the broadcasts are garbage, but the third one says: "9 23 9 12 12 18 5 20 21 18 14 2 1 20 13 1 14" which translates to " I WILL RETURN BATMAN".
Contributed By: Frances_Bean.
On a ship near the complete bridge going between the Industrial District and Amusement Mile, there is a tiny raised area on it. If you stop on this little platform and take out your Cryptographic Sequencer, you will start hacking something. This hack is very tough, but after you get it the trapdoor opens. When you go down you'll see several hundred bugs scurrying around and a dead henchman. If you zoom in on the henchman he will move a little bit. To the right of the henchman is a clipboard with Dr. J Crane's name on it, and an order for several thousand of those bugs.
Contributed By: KoHfam.
Achievement Description Value 50x Combo Complete a combo of 50 moves (any play mode, any character) 5 Acid Bath Save the damsel, but is she in distress? 10 Aggravated Assault Stop all assaults in Arkham City 10 AR Knight Complete all augmented reality training exercises 25 Bargaining Chip Reunite the separated couple 15 Brainteaser Rescue the fifth hostage from Riddler 40 Broken Toys Destroy it all 25 Bronze Revenge Obtain 24 medals on the original Arkham City ranked maps (as Batman) 10 Campaign Bronze Obtain 24 medals on the original Arkham City campaigns (as Batman) 10 Campaign Gold Obtain all 108 medals on the original Arkham City campaigns (as Batman) 40 Campaign Silver Obtain 72 medals on the original Arkham City campaigns (as Batman) 20 Catch Find someone to play remote Batarang catch with 5 Chimney Sweep There is only one way in 10 Communication Breakdown Clear the airwaves 10 Contract Terminated Stop the contract operative 25 Conundrum Rescue the first hostage from Riddler 20 Dial Z For Murder Stop the phone booth killer 25 Distress Flare Answer the call for help 5 Exit Stage Right All the world is a stage 50 Flawless Freeflow Fighter 2.0 Complete one combat challenge without taking damage (any character) 5 Forensic Expert Collect enough evidence to locate the gun for hire 10 Freefall Don't look down 25 Fully Loaded Collect all of Batman's gadgets and upgrades 10 Gadget Attack Use 5 different Quickfire gadgets in one fight (any play mode) 5 Genius Rescue all the hostages from Riddler 50 Ghost Train Fight for survival 25 Gladiator Last man standing 10 Gold Revenge Obtain all 72 medals on the original Arkham City ranked maps (as Batman) 40 Gotham Base Jumper Jump off the tallest building in Arkham City and glide for 1 minute without touching the ground 5 Hide And Seek A deadly game of hide and seek 25 I'm Batman Become the Bat 10 Intellectual Rescue the fourth hostage from Riddler 30 IQ Test Solve the first riddle 10 Lost And Found Uncover the secret of Arkham City 10 Mastermind Mastermind (20) 20 Mystery Stalker Reveal the mystery watcher 15 One Armed Bandit Hammer the point home 10 Pay Your Respects A moment of remembrance 5 Perfect Freeflow 2.0 Perform a perfect combo including all of Batman's combat moves (any play mode) 5 Perfect Knight - Day 2 Main Story, Side Missions, Upgrades, Collectables, New Game Plus and Riddlers Revenge (as Batman) 75 Puzzler Rescue the third hostage from Riddler 30 Ring Ring Answer a ringing phone 5 Sand Storm We are legion 25 Savior Save the medical volunteers 10 Serial Killer Track down the serial killer 25 Silver Revenge Obtain 48 medals on the original Arkham City ranked maps (as Batman) 20 Stop the Clock Time is running out 15 Story Teller Have 12 murderous dates with Calendar Man 10 Twice Nightly Complete New Game Plus 75 Wrecking Ball Stop the unstoppable 25
Catwoman DLC Achievements
Achievement Description Value Arkham City Sirens Drop in on an old friend 25 Campaign Kitty Campaign Kitty (25) 25 Family Jewels Retrieve your stolen goods 40 Feline Revenge Obtain all 72 medals on the original Arkham City ranked maps (as Catwoman) 25 Pick Pocket Steal the score of a lifetime 25 Sphinx' Riddle Complete all 40 of the Catwoman Riddler grid items 10
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