Codes cheats for Grand Prix Challenge

Grand Prix Challenge - Game cheats, tips and tricks for Playstation 1

Cheat mode
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Set a record lap time one any track. Then, enter one of the
following names at the lap record entry screen.

All tracks
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Enter TEAMPEEP as a lap record name.

All Grand Prix Challenges
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Enter IMHRACING as a lap record name.

Ace difficulty setting
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The fourth and final level of AI is called 'Ace AI,' and is
unlocked by winning Championship Mode