Cruis'n U.S.A.

Extra vehicles:
Hold C-Up + C-Left + C-Down at the car selection screen. The Muscle Car will become an All Terrain Vehicle, the La Bomba will become a School Bus, and the Devastator will become a Police Car.

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.

Flashing lights and siren:
Use the Bus or Police Car to get a new Hot Time. Enter your initials remain at the "Hot Times" screen. Scroll to the bottom of the display and hold Analog-Left for thirty seconds. A head will appear on the rolling conveyor belt and say "I love this job". Press Start and begin a new race with the Bus or Police Car. Press Brake twice, then hold Gas to flash the lights of the Bus or turn on the Police Car's siren. The lights and siren will be active as long as Gas is held.

Turbo boost:
Use the Bus or Police Car to get a new Hot Time. Enter your initials remain at the "Hot Times" screen. Scroll to the bottom of the display and hold Analog-Left for thirty seconds. A head will appear on the rolling conveyor belt and say "I love this job". Press Start and begin a new race and press Brake, Brake, Brake, Gas, Brake, Gas after each checkpoint. Although your vehicle will not exceed its top speed, it will accelerate faster. Note: This code is enabled only after you Cruise the USA three times to get your vehicle to the fourth level.

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.

Two player upgrade:
Normally in two player mode, only one of the players can get an upgrade for their car. To upgrade both players, race to the Washington D.C., quit, and save the game. Reset the Nintendo 64, and have player one beat the Washington D.C. course. Reset the Nintendo 64 again, and have player two beat the same course. Both players will now have their cars upgraded.

Secrets:

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.