Re-Volt

Cheat codes:
Enter these codes on the name wheel. Once entered, you can return to the wheel and input your proper name; the cheat will remain in effect.
carnival = all cars
tracker = all tracks
sadist = select weapons in game with right SHIFT key
changeling = change car in mid-race
makeitgood = activates in-game editors
tvtime = enables F5 and F6 cameras 
drinkme = makes cars small
urco = UFO selectable

Souped-up car cheat:
In the "cars" folder, go into any folder with a car that you can choose when racing. Open the Parameters.txt file and change the "TopSpeed" line to anything you want. Your car will go faster than all the other cars. Other things such as acceleration, steering rate, wheel size and much more can be changed as well.