How to unlock All Cars:
Go to the main menu and press Up, Down, Right, Right, Left, Up, Up, Down
Get All Tracks:
Go to the main menu and press Up, Up, left, Down, Left, Right, Right
Get Arcade Championship:
Go to the main menu and press Right, left, Up, Right, Down, Down, Left,, Left
Get Story Mode:
Go to the main menu and press Down, Left, up, Right, Right, Up, Down, left
Get Multi Player Championship:
Go to the main menu and press Left, Down, Left, Up, Right, Left, Down, Right