Get Cheat Mode Option
After unlocking any cheat you will get the Cheat Mode option on the options screen.
Get 2 Player Pursuit Mode
Beat Pursuit #3.
Get Driver's Ed Car
Finish driving 101 and get all gold medals.
Get Police car
Finish Pursuit 1.
Get Classic car
Finish Pursuit 2.
Get Gangster car
Finish Pursuit 3.
Get Hot Rod car
Finish Face Off 1.
Unlimited Boost
Complete all pursuits to unlock Permanent.
Invincibility Cheat
Finish all the Grand Prix Championships with Gold medals to unlock the Invulnerability option in the cheat menu.
Get Runaway Cheat
Finish all the Crash Mode with Gold Medals to unlock the Runaway Option in the Cheat Menu. This option is like Crash mode with no brakes or goals. R1 will give you a boost if pressed at the start.
Face off mode
Finish all races in championship mode with gold medals.
Speed boost at start
At the start of the race just after it shows 3-2-1. on the 1 do the tyre burn (press square then x)and you will get a huge speed boost at the start of the race.
Get All Cars & tracks (Requires Original Burnout Game)
Use a saved game from the first Burnout game that has Free Mode unlocked. To use the save game just select it at the load screen.
Get "I Can't Drive 55" song from Sammy Hagar
Get three Burnouts in one lap.
Get Hot Rod car
Finish Face Off #1.
Get Stock car
Finish Face Off #2.