Burnout cheats and cheat codes for XBox

Unlock Free Run mode, Free Run Twin mode, Credits options
Finish the game once.

Unlock Face-off mode against the Roadster:
Finish championship mode once

Unlock Bus: Beat the bus in Face Off four
Unlock Roadster: Beat the Roadster in Face Off mode
Unlock Saloon GT: Beat the Saloon GT in Face Off three

Get Full bonus
Drive a lap without a single accidents

Unlock Towtruck
Play in championship mode and unlock Face Off Two,
after beat the Towtruck once.

Unlock Survival mode:
Finish the Big Run GP to get access to survival mode. 

Face Off 3 option:
Finish the Savage Streets GP Tournament to get access to the Face Off 3 option.

Face Off 4 option:
Finish the USA Marathon Tournament to get access to the Face Off 4 option. 

Journeyman GP option:
Finish Face Off 1 to get access to the Journeyman GP option. 

Face Off 2 option:
Finish the Big Run GP to get access to th Face Off 2 option. 

Boost at start:
Press accelerate right before the "1" fades during the countdown.