Night Racing:
Hold L1 + L2 + R1 + R2 while selecting a track until headlights appear in front of the car. A new symbol will appear on the
track to confirm correct code entry.

Track Select:
Pause your game while in single player mode. Enter the Sound option, highlight the FX Volume selection, and press L1 + L2.
Then press Triangle to exit the screen. 

Faster Engine:
Select multi-player mode. Press X + Square + Triangle + Circle at the track selection screen. An engine will be displayed at
the bottom of the screen to confirm correct code entry. 

Jumping Cars:
Select multi-player mode and select a track and car. Press Circle + Left when the countdown that marks the start of the race
begins. 

Night Races:
While at the track selection screen press L1 + L2 + R1 + R2. 

Reversed Tracks:
First choose a track and press Select. Then, quickly hold X + Square as the cars enter the tunnel. While continuing to hold
those buttons, press Left or Right. The cars will turn around and enter the tunnel in reverse to confirm correct code entry. 

Upside Down Tracks:
While at the track selection screen press L1 + R1 + X + Down. An arrow will appear at the bottom of the screen to confirm
correct code entry.