In Time Attack, Free Run, or VS Battle select rain for the weather. While selecting the course starting point, hold down the following buttons to add weather effects.

• Fog: Hold Down Button L2
• Snow: Hold Down Button L1
• Thunder: Hold Down Button R2

Hold Select while choosing an area selection on the map screen. Let go of Select when the auto-pilot starts up. In the race you will be able to use a boost but only with cars that don’t have a turbo.

Turbo, Natural Aspired engines: Drive 1242 miles with one car to unlock engine for that car. Complete 0 of the game to use the engine with any car.

Note: this only works if the game is run on the PS2 Slim.

You can force wanderers to accept your challenge, even those whose challenges you have yet to meet.

Find a wanderer and go up to him or her. Open the lid on the PS2 slim and challenge the wanderer by flashing your lights. Wait until camera finishs rotating around his/her car then close the lid on the PS2 slim. The race should begin when the PS2 reads the CD.