Burnout 2: Point of Impact

Unlock all cheats:
Have a saved game file from Burnout with free mode unlocked on your hard drive.
Start Burnout 2 and load that saved game file.

Cheat mode
Unlock any cheat and the "Cheat Mode" option will appear at the options menu.

Unlock Invulnerability cheat at the "Cheat Mode" menu:
Win 1st place in all Grand Prix Championships

Runaway mode at the "Cheat Mode" menu:
Win 1st place in Crash mode on all 15

Freerun at the "Cheat Mode" menu:
Finish the Custom Series Championship

Face Off
Win 1st place in all of the face offs in the 1st championship.

Unlock Two player pursuit mode
Finish Pursuit 3

Unlock Multi-player mode
Finish the 1t set of Offensive Driving 101 lessons

Unlock Unlimited Boost at the "Cheat Mode" menu:
Unlock everything in the Custom Series Championship

Unlock Custom Series Championship
Earn all gold medals in every race and win everything in the 1st championship

Unlock New Cars
To unlock the following cars, you have to complete the following tasks:

Super car: Win 1st place in Face Off 4
Custom Compact: Win 1st place in Custom Series Qualifier.
Custom Coupe: Get all gold medals at Split Second Grand Prix.
Custom Muscle Car: Win 1st place in Pursuit 6.
Custom Pickup Truck: Win 1st place in Pursuit 5.
Custom Roadster: Get all gold medals at the Point Of Impact Grand Prix.
Custom Sports Car: Get all gold medals at the Speed Streak Grand Prix.
Custom SUV: Win 1st place in Pursuit 4.
Classic 1970 Car: Destroy the car with a police car in Pursuit 2.
Drivers Ed Car: Get all gold medals in Driving 101.
Gangster Car: Win 1st place in Pursuit 3.
Hot Rod Car: Win 1st place in Face Off 1.
Japanese Muscle Car: Win 1st place in Face Off 2.
Oval Racer: Win 1st place in the car in Face Off 2.
Police Car: Win 1st place in Pursuit 1 and destroy criminals car

1997 Eclipse, 2001 Focus SVT:
Finish the Custom championship twice and reach the best score in the races


Unlock Cheats in championship mode
The unlocked cheats normally cannot be used to win championship mode.
But you can use the following trick:
Use the cheats to win everything until the last race.
After, go back to the main menu and deactivate the cheat.
Go back to race, and just win the last race.
You will have all the medals which previously earned.