Select the "Cheat" option at the menu. Enter one of the following codes to activate the corresponding cheat function:
ALL. - Activate all codes
CHAR - Character test mode
WIN. - Win all races
RESP - Everyone respects you
PINT - All arcade mode cars and some developer tracks
CASH - Extra money
CARS - All cars
CREW - Full crew
Get a Viper GTS fully tuned and go to the oval track. Drive about 210 mph. When you are about to turn, turn the other way into the wall. Hit the nitrous and hold it while still turning into the wall. If done correctly, your car should go up and fly. You must be in the dirt part of the turn. Try using the nitrous two seconds before hitting the wall and hit the wall (wire fence) at about a 30 degree angle.
Successfully complete all the series in Arcade mode, except the Extreme Nitrous Series, to unlock the Bronze, Silver, and Gold Prototype Challenge Series.
All Prototype parts
Get 1,500 respect points from all CPU characters to unlock all Prototype parts.
Get a 100% completion in Career mode to unlock Prototype mods for all cars in Career mode and the Extreme Nitrous Series in Arcade mode.