PS2 HSX: Hypersonic Extreme Cheats

Unlock All Cars:
To unlock all cars, hold R1+L1 at the main menu, then press TRIANGLE, X, X, CIRCLE, X, CIRCLE, TRIANGLE, X.

Unlock All Tracks:
To unlock all tracks, hold R1+L1 at the main menu, then press SQUARE, SQUARE, SQUARE, X, TRIANGLE, TRIANGLE, SQUARE, X.