- +1 million Studs
At the main menu, press X, Y, B(2), Y, X, L(2), R(2), Up, Down, Left, Right, Begin, Select. If you entered the code correctly, you will hear a sound.

- Play as Huntress
Successfully complete the game (all three chapters) to unlock Huntress for purchase for 200,000 Studs at the Batcave.

- Play as Azrael
Successfully complete the game (all three chapters) to unlock Azrael for purchase for 1.5 million Studs at the Batcave.

- All characters
At the main menu, press X, Up, B, Down, Y, Left, Begin, Right, R(2), L, R(2), Down(2), Up, Y(3), Begin, Select to unlock all characters. If you entered the code correctly, you will hear a sound.

- Villain Hunt mini-game
Successfully complete all three Villain chapters at Arkham Asylum to unlock the Villain Hunt mini-game.

- All episodes and Free Play mode
At the main menu, press Right, Up, R, L, X, Y, Right, Left, B, L, R, L, Down(2), Up, Y(2), X(2), B(2), Up(2), L, R, Begin, Select to unlock all episodes and Free Play mode. If you entered the code correctly, you will hear a sound.

- Faster ending sequence
While the Studs are being totaled during the ending sequence, press A to skip the animation. You will still get credited for the Studs you earned and will get through the process faster.

- +3 million Studs
At the main menu, press Up(2), B, Down(2), X, Left(2), Y, L, R, L, R, B, Y, X, Begin, Select. If you entered the code correctly, you will hear a sound.

- All extras
At the main menu, press Up, Down, L, R, L, R, L, Left, Right, X(2), Y(2), B(2), L, Up, Down, L, R, L, R, Up(2), Down, Begin, Select to unlock all extras. If you entered the code correctly, you will hear a sound.