From the main menu hold the R-TRIGGER and enter:

UP, RIGHT, DOWN, UP, RIGHT, DOWN

Then release the R-TRIGGER. If you entered the code correctly the screen will sort of flicker. Now you can enter any race and select any Snomobile. When you actually start the race you'll have an ATV instead.

From the main menu hold the R-TRIGGER and enter:

RIGHT, RIGHT, LEFT, LEFT, RIGHT, RIGHT

Then release the R-TRIGGER. If you entered the code correctly the screen will sort of flicker. Now you can enter any race and select any Snomobile. When you actually start the race you'll have a GoCart instead.

From the main menu hold the R-TRIGGER and enter:

RIGHT, UP, LEFT, B, Y, X

Then release the R-TRIGGER. If you entered the code correctly the screen will sort of flicker. Now you can enter single-player mode and race the Kiruna Track.

From the main menu hold the R-TRIGGER and enter:

UP, Y, UP, Y, UP, Y

You'll then have access to every League, Snowmobile and Track.

From the main menu hold the R-TRIGGER and enter:

UP, UP, UP, DOWN, DOWN, DOWN

This will launch the Demo mode.