Unlock Bonuses:
After pausing the game HOLD L1 + L2 + R1 + R2 and press Down, Up, Down, Up, Left, Right, Left, Right.
Unlock Unlimited Combo Meter:
After pausing the game HOLD L1 + L2 + R1 + R2 and press Left, Right, Up, Down, Right, Left, Down, Up.
Unlimited Health:
After pausing the game HOLD L1 + L2 + R1 + R2 and press Up, Right, Down, Left, Up, Left, Down, Right.
Unlock All Upgrades:
After pausing the game HOLD L1 + L2 + R1 + R2 and press Up, Up, Left, Left, Right, Right, Down, Down.
Unlock Dark Knight Difficulty:
After pausing the game HOLD L1 + L2 + R1 + R2 and press Down, Left, Right, Up, Up, Right, Left, Down.