The following three cheat codes are all to be entered using the R1 button on the joypad on the Main Menu when the word "Course" is flashing. If you have entered any of the codes properly, you will hear the rev of a Grand Tour racecar engine. It may take a couple of tries, but it will be worth it. Following this sound, all you have to do is go to the particular course which you have unlocked using the "Course" selection icon on the Main Menu and choose from any of the six available course variations! They only get more difficult as you progress, so keep your roll bar up! 

1. To unlock all of the six course variations for the Switzerland level, use the R1 button on the joypad and tap out the rhythm similar to that found in the song "Doh, a deer, a female deer". If for some strange reason, you do not know this world-famous ditty, just call your kindergarten teacher, 'cause that's where you learned it.

2. To unlock all of the six course variations of the Easter Island level, use the R1 button on the joypad and tap out the rhythm similar to that found in the song "Happy birthday to you, happy birthday to you." If you don't know the rythmn to this timeless classic, you have to be nicer to your friends, so that they will sing it to you next year.

3. To unlock all of the six course variations for the Egypt level, use the R1 button on the joypad and tap out the rhythm similar to that found in the song "Always look on the bright side of life." If you're not familiar with this English chart-topper, you need to start living your life in a more tongue-in-cheek manner.

New Multi-Player Mode and Additional Tracks  -  Set the game mode to split-screen, then repeat the above procedure, but replace "doe an deer.." with:
Zip-e-dee-doo-da, Zip-e-dee-ay and wait. Again, the engine will roar and the "Track Complete" message will appear. You may now race the 4 Player Tracks in 2 Player Mode, and the 2 Player Tracks in 4-Player Mode.

This cheat also accesses the Head-to-Head mode. Here, 2 players drive in opposite directions around the track. Note, however, that this mode only works on "A" Tracks. There are more cheats, and I'll release them over the next month or two.

EXTRA LEVELS:

These EXTRA LEVELS were accessed in the single race mode.

Easter Island 2:

Start the race with any team. After you go through the lava tunnels you will come to a "S" curve in a jungle area. At the end of the "S" curve go to the right, off the track and on to the grass just before the red and white road block. Follow the grass to a small beach. At the end of the beach you will find a gold object. Run over it and it will take you to an EXTRA LEVEL where you will race Easter Island in a Rally Car.

Hong Kong 5:

Start the race with any team. When you get to the dirt road, go to the second bridge. Go under the bridge and you will find a gold object. Run over the gold object and it will take you to an EXTRA LEVEL where you will race Hong Kong in a Dakar Car.

Scotland 3:

Start the race with any team. As you head towards the dark, forested part of the track, climb the slanted rocks on the right side just before the forest starts. Climb above the road into the woods. Drive in the woods until you get to the turn with the black and white backstop. Go behind the backstop and you will find a gold object. Run over the gold object and it will take you to an EXTRA LEVEL where you will race Scotland in a Dune Buggy.

Unlock Sports Car:

In Switzerland be any car and drive till you see the houses and the people on the left and go up the hill and go behind the ski shop and you will find the gold object. you will be able to race in a sports car.