Master code:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter EVOS. This will unlock all the Extreme bonus cars and Expert mode. 

Turbo mode:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter NITRO. 

UFO vehicle:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter UFOPTER. 

Chrome paint:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter CHROME. 

Overhead view:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter SATALITE. 

Low gravity:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter LUNAR. 

Bouncing cars:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter KANGAROO. 

Swaying objects:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter SWAY. 

Rear-drive cars:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter PUSHME. 

High pitched co-driver:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter HELIUM. 

Disco lighting:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter DISCO. 

Motion blurred graphics:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter MOBLUR. 

Reversed controls:
Go to the "Archives" and enter the "Secrets" section. Press X to enter a code, and 
enter FLIPLEFT.