Enter the following passwords without the quotes as a name and then start a game in Rally or Time Trial mode to unlock the corresponding effect.
Unlock ALL Tracks: Enter 'OPENROADS'.
Unlock ALL Cars: Enter 'SHOEBOXES'.
Unlock Reversed Tracks: Enter 'SKCART'.
Unlock ALL Tracks at Night: Enter 'NIGHTRIDER'.
Unlock Four wheel Steering: Enter 'TROLLEY'.
Unlock Rear wheel Steering: Enter 'FORKLIFT'.
Unlock Fog Mode: Enter 'PEASOUPER'.
Unlock Turbo Mode: Enter 'MOREOOMPH'.
Unlock Micro Machine Mode: Enter 'DIDDYCARS'.
Unlock Hovercraft Mode: Enter 'HOVERCRAFT'.
Unlock Pursuit Mode: During gameplay pause the game and press Triangle + Square + Circle 6 times. Then press L1, L2, R1, R2 6 times. If the code has been entered correctly Nicky Grist will say 'Alright lets kick it' as confirmation.