Buggy mode:
Hold Select and quickly press Right, Up, Triangle, Left, Up, Square, Triangle on the practice, qualify, race option screen. The phrase "Buggy Mode Activated" will confirm correct code entry. Your car will turn into a small 4x4 buggy.

Bike mode
Hold Select and quickly press Down, Up, Circle, Triangle, Right, Up, Square, Triangle on the practice, qualify, race option screen. The phrase "Bike Mode Activated" will confirm correct code entry. Your car will turn into a small motorbike.

Lava track:
Hold Select and quickly press Square, Circle, Up, Right(2), Circle, X on the practice, qualify, race option screen. The phrase "Lava Mode Activated" will confirm correct code entry. The track will turn into lava, with remaining areas gray.

Gibberish mode:
Hold Select and quickly press Left, Circle, Up, Down(2), Right, Circle, Square(2) on the practice, qualify, race option screen. The phrase "Gibberish Mode Activated" will confirm correct code entry. Murray will speak in gibberish.