Cruis'n USA

Extra Cars:
Go to the car select screen.
Press and hold the up "C" button.
Press and hold the left "C" button.
Press and hold the down "C" button.
While you are holding down the above buttons, put the cursor on one of the left three cars. You can now choose the police car, the school bus or the jeep.

Automatic Lights and Sirens:
To make the lights or sirens go on automatically, choose the school bus or police car and start a race. When it says the name of the place you are press brake, brake and then hold gas, after 3 seconds the lights or sirens should automatically go on

Bonus Tracks:
To access three tracks that you normally can not race without "Crusin' the USA", go to the track selection screen and hold the proper buttons:

Golden Gate Park -- L + C-Left + C-Down
Indiana -- L + C-Right + C-Up
San Francisco -- L + C-Right + C-Down

Secret Head:
To view the secret head, make a "Hot Time" on any stage. Enter your initials and scroll down to the bottom of the screen, then hold Left on the analog stick for about 35 seconds. A head should come moving down the conveyer belt saying "I love this job."

Nitro Boost:
Enable the "Secret Head" code, then start a new race. While driving, press Brake, Brake, Brake, Gas, Brake, Gas after each checkpoint for a nitro boost. This won't increase your top speed, but it will increase your acceleration

Golden Gate Park track:
Hold L + C-Left + C-Down at the track selection screen. The U.S. 101 track will become Golden Gate Park.

Indiana track:
Hold L + C-Right + C-Up at the track selection screen. The Beverly Hills track will become Indiana.

San Francisco track:
Hold L + C-Right + C-Down at the track selection screen. The Grand Canyon track will become San Francisco.

Missing wheel:
Finish a two player challenge game and continuously sweep the Analog Stick in a clockwise Full-Circle. The right front wheel of the losing player's vehicle fall off after the car rotates about four times.

Alternate vehicle colors:
Win the "Cruise The USA" mode with the difficulty set to 1, 3 or 5. The car used to win the race will be selectable in a new color. The alternate cars are faster then the original version. Press C-Up to select the alternate colors. Note: This also works with the three hidden vehicles.

Chicago broken down car:
There is a car broken down on the right side of the road on the Chicago track after the first two turns. If you hit the car, it will fall in front of the first place vehicle.

Grand Canyon shortcut:
Stay along the right side of the road after the first check point. Follow the dirt ramp that appears, and cross the natural bridge at a fast speed.

Grand Canyon boulder:
Run into the large rocks on the side of the road at high speed. The boulders will gain speed as they roll down the road before smashing into the first place vehicle.

Washington D.C. warp:
Watch for the orange tinted brick wall on the left side of the road. Approach the wall, get on the grass, and jump through the crack to reach the next check point.

Iowa Woman:
Look for the single tree on the left side of the road after the first checkpoint. Face the tree and slowly run over it. A woman standing next to a sign with the word "DAWN" will now be visible