Unlock all Circuit Tracks: Down, R1, R1, R1, R2, R2, R2, Square
Unlock all Drag Tracks: Right, Square, Left, R1, Square, L1, L2, R2
Unlock all Drift Tracks: Left, Left, Left, Left, Right, R2, R1, L2
Unlock all Sprint Tracks: Up, R2, R2, R2, R1, Down, Down, Down
Unlock Drift Physics in all modes: R1, Up, Up, Up, Down, Down, Down, L1
Only codes I know....hope it helps.
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