Hidden costume select screen
Well get one of your save games, on menu display and press the buttons: Left, Left, Down, Down, Left, Left, Right, Up, Up, Down. You'll hear a bat flutter noise. Selected to continue your game and you will come to the clothing select screen.
New Game + mode
Finish the game under the
or Hard difficulty setting. This mode lets you keep
your historicallyin the past earned devices and experience points. Also, there
won't be any counter icons on thugs, thugs will be more difficult from the
outset, thugs will have different configurations, and Bosses will be tougher. Normal
Easy "Story Teller" trophy or achievement
Play offline (not logged in to Xbox Live or PlayStation Network as your technique date is automatically set by the net). Set the date of your console to a holiday date (for example, January one, February 14, etc.) then load a saved game file where the story progress is past rescuing Catwoman. Enter the courthouse and talk to Calendar Man in the basement. He will tell you a narrative about the current month's holiday and tell you to return for the next month. Save the game by leaving the building. Exit to the technique settings, then by hand alter the date to the next holiday. Repeat the technique until you have cycled through the whole calendar year. The calendar on the wall next to his cell will highlight the holiday dates for the current year and scribble out which months you have already spoken to Calendar Man about.
Finding Nora Fries
After the boss battle w/ Freeze, go to the north gotham docks, create an ice raft and pull yourself over to the wall; blow through it w/explosive gel, and go through the door; defeat Joker goons, then go back to GCPD lab to Freeze and tell him about her. P.S. if you go there later, Freeze will be there; scan him next to the tank to get solve riddle.
Hidden messages - I WILL RETURN BATMAN
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".
Hidden messages - YOU WILL PAY FOR WHAT YOU HAVE DONE TO ME
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".
TV show Lost reference
When you go to Steelmill the second time and look at the large TV screen you will see "The Joker" now watch that movie and joker will say "How come it all ended in a church"
Pregnancy test in Steel Mill
Right before you fight joker in the Steel Mill if go to the old harly quin dress on the floor to the left you will see a POSITIVE pregnancy test and on the desk you will see the box for it.
More info: locate the Steel Mill in Joker's Funhouse, there will you find a costume for Harley Quinn, and on the floor next to is a positive pregnancy test. And at the ending credits, you will hear Harley singing.
Killer Croc movie
First you have to beat "Ra's al Ghul" and exiting the subway tunnels, instead of correctly, back track until a gate blocking your path. Do you see a button on the wall and a hole in the iron bars. Throw the Batarang through the hole to hit the button. There will be a movie with Killer Croc.
Secret Ship reference
To see this reference you must upgrade Cryptographic Sequencer with the "Tyger" code installed to enter this secret room. Now just go to north of the Industrial District in the Harbord, Falcone boat slip on the westside of the two cranes - where you get the first set of Augmented Reality challenges. Use the cryptographic sequencer hack to the door on the boat. Enter "CityofTerror" as a password to open the hatch on the boat. Inside you will find some containers with roaches on them and a dead prisoner. There is also an invoice for shipping Dr J. Crane (Scarecrow's real name), implying that the Scarecrow Killer Croc encounter to survive.