Circuit Breakers Cheats
Track Select
Using 1 player mode pause the game and go to the Sound option, highlight the FX Volume selection, and press L1 + L2. Then press Triangle to exit the screen.
Night Racing
While selecting a track Hold L1 + L2 + R1 + R2 until headlights appear in front of the car. A new symbol will appear on the track to confirm correct code entry.
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. You can also press L2 + R2 + X + down at the track select screen
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.