All gold medals,and all bonus cars.
Once the game boots up, go to cheats then highlight "Unlimited Time". Next, hold down L2, R1, d-pad right, and circle. You will then have all levels done with a gold medal, all of the bonus cars unlocked, and all of the cheats unlocked. The cheats are awsome. You got to try all of them except for the one that says "Poor suspension".
We have more cheats and tips for this game here, Wreckless: The Yakuza Missions cheats
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