CheatCodes.com has all the official Guitar Freaks PSX cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Saturday May 18, 2013 for Guitar Freaks are shown below.
While at the Mode Selection Screen, press Pick, Pick, Red, Blue, Red, Blue, Green, Green.
While at the Mode Selection Screen, press Red, Green, Blue, Pick, Pick.
While at the Mode Selection Screen, press Pick, Green, Green, Pick.
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