World Rally Championship 2 Extreme

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.
Andrew Young.

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.