Cheat mode
At the main menu, press L2, R2, L2, R2, Square(2), Circle(2). If you entered the code correctly, you will hear a sound.

All power moves and 120 achievement points
At the main menu, press L1(2), R2(2), L2, R2, L1, R2. If you entered the code correctly, you will hear a sound.

Infinite Handcuffs
At the main menu, press Square, Circle, Square, Circle, L2, R2(2), L2(2). If you entered the code correctly, you will hear a sound.

Infinite Batlauncher
At the main menu, press Circle, Square, Circle, Square, L1, R1, L2, R2. If you entered the code correctly, you will hear a sound.

Infinite batarangs and electric batarangs
At the main menu, press L1, R1, L2, R2. If you entered the code correctly, you will hear a sound.