Bonus tracks and challenges
At the main menu, hold L1 + R1 for approximately one second. Then, press Left, Right(7), Left(15) to unlock all challenges and four bonus tracks. If you entered the code correctly, you will hear the sound of a crash.
Race with double decker buses
At the main menu, hold L1 + R1 for approximately one second. Then, press Left(3), Right(15), Left(3), Right(11), Left(14), Right(5), Left(25). If you entered the code correctly, you will hear the sound of a crash.
Bonus tracks...