All challenges and 4 bonus tracks:
At the main menu, hold L1 + R1. Then, press Left 1 time, Right 7 times & Left 15 times.
Race with double deckers:
At the main menu, hold L1 + R1. Then, press Left 3 times, Right 15 times, Left 3 times, Right 11 times, Left 14 times, Right 5 times & Left 25 times.
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Newman/Haas Racing Cheats, Codes & Walkthrough/Guide/FAQ for PlayStation from Cheat Code Central
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