Grooverider: Slot Car Thunder

At the main menu, select "Single Player", then choose "Time Trial" and enter a
name to unlock the "Cheats" option at the main menu. Select the "Cheats" option,
then enter one of the following codes to activate the corresponding cheat
function:
  All bonuses
  Enter "MARK" as a code to unlock all bonuses and the "Ghost Mode" option.
  View credits
  Enter "BGM" as a code to view the credits sequence.

Bedroom car:
Finish first on the Dining Room track two times in the 3V class to unlock the
Bedroom car.
Eagle car:
Finish first on the Dining Room track in the 3V class to unlock the Eagle car.

 