Beat 'Em:
Beat Championship mode to unlock 6 more tracks, Arcade mode for 8 more tracks, and Indoor mode for 5 more tracks.

Full Pause Screen:
As with most other Dreamcast games, hit X+Y at the pause screen to remove the menus from view.

Jackpot Cheat:
After finishing a race in Championship mode, save your game in case a you get to try for the jackpot. If you don't win it on the first try, simply reload your game in the options menu and keep trying until you win.

Boost Start:
In a race, when the time is counting down, right before the 1 fades away press gas and turbo at the same time and you will get a small amount of turbo to get to the first boost icon.

Three New Trucks:
Complete championship, arcade, and indoor modes to unlock one new truck for each game mode completed.

Bonus Championship Tracks:
Complete championship mode to unlock the Atlas Sandstorm, Corsica Rain, Far West Night, Iceland Snow, Scandinavia Storm, and Norway Night tracks.

Bonus Outdoor Arcade Tracks:
Complete outdoor arcade mode to unlock the Scandinavia, Jordan, Greece Sunset, Norway, Iceland, Atlas, Alps, and Canada rain tracks.

Bonus Indoor Arcade Tracks:
Complete indoor arcade mode to unlock the Indoor Scandinavia, Indoor Far West, Indoor Iceland, Indoor Atlas, and Greece daylight tracks.

GameShark Codes

999 Points
1FB414BB000003E7
 
Infinite Cash
821B8F2A00000010
 

Thanks to Revolution readers jezz N., Richard Roodbeen and Bob Hashman!