Batman: Arkham City

Hold L1 + R1 and rotate the Right Analog-stick clockwise ten times. Repeat the code to disable its effect.

Take out your cryptographic sequencer and hold L1 and R2. Rotate the right analog clockwise. Do this until Batmans head becomes big. All enemies will have a big head as well.

Using the cryptographic Sequencer, set the coordinates to 200, 500. A voice will speak the following 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. To decode requires a bit of work. First set each number to a letter in the alphabet but in reverse so that Z=1, Y=2, X=3 and so on. From there you use a special cipher known as a Vigenere Cipher that requires a keyword to translate. By using the keyword "scarecrow", the message is translated to "FEAR WILL TEAR GOTHAM CITY TO SHREDS". Due to the keyword being scarecrow, it could be implied that Scarecrow is behind at least this message and possibly more.

One of the last four Augmented Reality Challenges appears to be difficult because you are supposed to execute a U-turn during your dive bomb. This can be done easier by using the grapple boost going past the first checkpoint, then turning around while gliding. You can then glide through all the checkpoints much easier.

Go to the Riddlers Challenges and go to Custom Challenge. Select the first map and under modifiers choose Takedown Projectiles. This will make it so that your batarang will knockout enemies in 1 hit. Spam the batarang through all 4 rounds knocking out the enemies without getting hit once and you will get the trophy.

Go to the manager's office inside the Steel Mill. On the floor, next to the Harley Quinn costume, there is a positive pregnancy test.

Use Batman's Cryptographic Sequencer and track down the XY coordinates 700, 490. You'll intercept a radio frequency that reads the following numbers:9-23-9-12-12-18-5-20-21-18-14-2-1-20-13-1-14 (it will then make a buzz sound and repeat these numbers)When matched to the corresponding letters of the alphabet they spell out I WILL RETURN BATMAN.

Using the Cryptographic Sequencer, locate coordinates 500,900. You will intercept a frequency repeating the number sequence "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". To decode, 1 = C, 2 = B, 3 = A, 4 = Z, and so on. Decoded, the message reads "YOU WILL PAY FOR WHAT YOU HAVE DONE TO ME".

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".

Play the mission where you have to get the cure back from Joker. There is a part where a video plays featuring the Joker ranting about the ending to the show Lost.