Unlock Bonus Cars
At the main GRID menu go to 'Options' and then 'Bonus Codes' and enter the one depending on which seller you brought the game from to unlock the corresponding car in the game.
Unlock ALL Muscle Cars:
Enter the code MUS59279
Unlock ALL Drift Cars:
Enter the code TUN58396
Unlock BMW 320si (Gamestation):
Enter the code G29782655
Unlock PAGANI ZONDA (Micromania):
Enter the code M38572343
Unlock Aston Martin DBR9 (Play.com):
Enter the code P47203845
Unlock BMW 320si (Buchbinder):
Enter the code F93857372
Don't stop here... Check out our complete collection of GRID cheats
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