Hold L + R and press Up, Right, Up, Left, Down, Left, Down, Right at the screen with the "Story Mode" and "Challenge Mode" options. A message will appear to confirm correct code entry.
Unlimited combo meter
Hold L + R and press Left, Right, Down, Up, Up, Down, Right, Left at the screen with the "Story Mode" and "Challenge Mode" options. A message will appear to confirm correct code entry.
All upgrades
Hold L + R and press Down, Up, Down, Left, Down, Right, Up, Down at the screen with the "Story Mode" and "Challenge Mode" options. A message will appear to confirm correct code entry.
All bonuses
Hold L + R and press Left, Down, Left, Right, Left, Left, Down, Right at the screen with the "Story Mode" and "Challenge Mode" options. A message will appear to confirm correct code entry.
Dark Knight difficulty setting:
Hold L + R and press Right, Up, Up, Right, Left, Down, Right, Up at the screen with the "Story Mode" and "Challenge Mode" options. A message will appear to confirm correct code entry.