Find Secret Cars:
To find secret cars, search for the paint cans marked with ????. Going through the can will unlock the car.

Pencil-Drawn Mode:
In Paris, go to the Musee du Louvre and drive up to one of the glass pyramids. Press up on the right analog stick to look at it. Hold your stare for 30 seconds and the screen will have a textured look, and everything will look like it's sketched on.

Super Sonic Mode:
When in Washington DC find the Lincoln Memorial and pull up to his feet. Using the right thumb stick, look up at him and hold it there for 20-30 seconds. The screen should go black and white. Drive away and you will notice that you are in super sonic speed mode.

Unlock New Cars:
Fulfill the criteria listed below to unlock the indicated vehicle:
Paris Bus: Win the first three checkpoint races in Paris.
Washington Bus: Win the first three checkpoint races in Washington.
Fire Truck: Win the first six checkpoint races in Paris.
Cement Truck: Win the first six checkpoint races in Washington.
Armored Car: Complete the Paris security guard job.
Freightliner Century Class S/T: Complete the first six blitz races in Washington.
Hummer H2 SUV: Complete the Washington Salesman job.
FLE: Complete the Paris Delivery Guy job.
Limousine: Complete the Paris chauffeur job.
Cadillac Escalade: Complete the Washington Limo Driver job.
Ambulance: Complete the Paris Paramedic job.
Taxi: Complete the Paris Taxi Driver job.
Paris Police: Complete the Paris Police Officer job.
Washington Police: Complete the Washington Police Officer job.
Chrysler PT Turbo: Complete the Washington Rental Car Driver job.
1959 Eldorado Seville: Complete the Washington Pizza Deliverer job.
Mini Cooper S: Complete the first three blitz races in Paris.
Chevrolet SSR: Complete the first three blitz races in Washington.
Saab 9-3 Turbo: Win the tenth checkpoint race in Paris.
Audi TT: Complete the Paris Special Agent job.
Chrysler Crossfire: Win the tenth blitz race in Washington.
Audi S4 Avant: Complete the first six blitz races in Paris.
1967 Ford Mustang 2+2 Fastback: Complete the Washington Stunt Car Driver job.
Chevrolet Corvette Z06: Win the tenth checkpoint race in Washington.
Lotus Esprit V8: Win the tenth Paris Blitz race.
Dodge Viper SRT-10: Complete the Washington Private Eye job.
Koenigsegg CC: Complete it ALL.

Unlock every car:
At the car select screen, click and hold the left analog stick, then press L, R, L, L, L, R, R, R, L, L, R, R.This cheat works.

secret cars info:
Hi want to know what the secret cars are? I will tell you, in paris the secret car is called the asp it's colour is blue and orange.The other secret car is called the serpment mk2 it has a colour choice of blue & white, yellow & black (My favorite) and black.