Burnout Cheat Codes for Gamecube

All racers:
At the options screen press X + Y + B.

Saloon GT:
Beat the Saloon GT in Face Off 3.

Bus:
Beat the bus in Face Off 4.

Ending bonuses:
Complete the game to unlock the Free Run mode (no vehicles on the road), Free Run Twin mode (two player Free Run), and Credits options.

Face off mode:
Complete championship mode to unlock face off mode against the Roadster.

Towtruck:
Play in championship mode until you unlock Face Off number 2 in the special options screen. Beat the Towtruck once to unlock it.

Roadster:
Beat the Roadster in face off mode to unlock it and another face off race against another car.

Survival mode
Successfully complete the Big Run GP to unlock survival mode.

Face Off option
Successfully complete championship mode once to unlock Face Off 1 against the Roadster.

Face Off 3 option
Successfully complete the Savage Streets GP Tournament to unlock the Face Off 3 option.

Face Off 4 option
Successfully complete the USA Marathon Tournament to unlock the Face Off 4 option.

Full bonus
Drive a perfect lap (a lap without any accidents) and your bonus will be automatically filled.

Quick start
Accelerate immediately before the "1" fades during the pre-race countdown to start with a slight boost in speed.

Better turns
When turning sharp corners, lightly tap the gas to turn sharper and slide less.

Interstate: No traffic
Select the Interstate course. When the race begins, drive over to the other side of the highway into the HOV lane (brown with white diamonds). Look over the barrier that separates oncoming traffic. There will be no traffic on the other side.

Interstate: Flip car off track
Select the sports coupe as your car and the Interstate track. On the two lane highway section of the track with the dirt median in the center, get a turbo boost. Use the turbo to gain speed. At the end of the stretch of road will be the green arrows directing you to the exit. Just off to the right of the arrows there will be a metal barrier. Hit it slightly to the right while doing the turbo boost and your car should fly over the barrier and into a ravine.

Interstate: Pit stop
When you begin the race and drive on to the first highway, go to the far right of the highway. There will be an opening that you can drive into. It is not much -- you will just see a gas station. Drive forward past the gas station and there will be another opening that leads you out.

River City: Climb a mountain
Before the first tunnel, slant right and go up the hill. If done correctly, you should climb up until you lose all your speed, or get to the top.

Rush Hour: Boost
On Rush Hour, you can drive on the wrong side of the road to keep your boost up. If you are good enough, you can use a non-stop turbo throughout the entire course.