Enter LEIPZIG as a code to lock all cars previously unlocked with the UNLOCKALLTHINGS code.

Enter COLLECTORSED as a code in the Collector’s Edition to unlock the Acura NSX, Acura Integra, Audi RS4, Lexus IS350, and Pontiac Solstice GXP.

Enter ITSABOUTYOU as a code.

Enter MITSUBISHIGOFAR as a code.

Enter WORLDSLLONGESTLASTING as a code.

Enter ZEROZEROZERO as a code.

Enter ITSABOUTYOU as a code.

Enter HORSEPOWER as a code.

Enter ENERGIZERLITHIUM as a code.

Enter CASTROLSYNTEC as a code. Note: This code will also result in an additional $10,000.

Enter SAFETYNET as a code.

Enter 1MA9X99 as a code for $2,000.

Enter W2iOLLO1 as a code for $4,000.

Enter L1iS97A1 as a code for $8,000.

Enter CASHMONEY or 1Mi9K7E1 as a code for $10,000. /* */  

Enter REGGAME as a code for $10,000 and some cars including the Chevrolet Camaro Concept, Ford Mustang GT 500, and Nissan R34 Skyline.

Enter UNLOCKALLTHINGS to unlock the map, more cars (2004 Pontiac GTO, Chevrolet Cobalt SS, Dodge Viper SRT10, and another Nissan 240SX), all of the race days, and stage 4 performance parts.

Enter Career mode. Select the "Secret Code" option at the menu. Enter one of the following codes to activate the corresponding cheat function. The message "Congratulations! Your code has been accepted and your reward has been unlocked" will appear to confirm correct code entry. Most codes can only be enabled once. Therefore it is recommended that the auto-save option be disabled before using the codes in the event you wish to revert the game to its original state. Also, using some codes may reset the performance of cars that have previously been improved.