Guitar Hero III has no traditional cheat codes. Players discovered timing exploits:
Blue, Blue, Red, Green, Green, Yellow, Yellow – All GuitarsBlue, Red, Yellow, Blue, Red, Yellow, Blue, Red, Yellow – All Songs (GH3 disc only)Yellow, Yellow, Blue, Red, Red, Green, Green – Performance ModeRed, Yellow, Blue, Red, Red, Blue, Blue, Red, Yellow – HyperspeedExploits are inconsistent and removed in title updates. Play fair; the challenge is the fun.