Complete the following achievements to unlock Xbox Live Gamerscore points.
 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 CASTROLSYNTEC as a code. Note: This code will also result in an additional $10,000.
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.
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