Guitar Hero III Cheats
Cheat: No Failure
To make it impossible to fail a song, insert the following code in the in-game cheats menu. Keep in mind that this cheat will not work in Career Mode: Green & Red, Blue, Green & Red, Green & Yellow, Blue, Green & Yellow, Red & Yellow, Orange, Red & Yellow, Green & Yellow, Yellow, Green & Yellow, Green & Red.
Unlockable: Hyperspeed
To unlock Hyperspeed, go to the in-game cheat menu (found under Options) and insert the following cheat on your guitar: Orange, Blue, Orange, Yellow, Orange, Blue, Orange, Yellow.
Unlockable: Boss Characters
To unlock any boss characters as playable character, simply beat them in the game and they will become unlocked.
Unlockable: Air Guitar
To unlock the Air Guitar, insert the following notes in the Options menu: Blue & Yellow, Green & Yellow x2, Red & Blue x2, Red & Yellow x2, Blue & Yellow, Green & Yellow x2, Red & Blue x2, Red & Yellow x2, Green & Yellow x2, Red & Yellow x2.
Unlockable: Through the Fire and Flames
To unlock the track "Through the Fire and Flames", beat the game.
Submitted by DeeboUnlockable: Performance Mode
To unlock Performance Mode, insert the following notes in the Options menu: Red & Yellow, Red & Blue, Red & Orange, Red & Blue, Red & Yellow, Green & Blue, Red & Yellow, Red & Blue.
Unlockable: Precision Mode
To unlock Precision Mode, insert the following notes in the Options menu: Green & Red x3, Red & Yellow x2, Red & Blue x2, Yellow & Blue, Yellow & Orange, Yellow & Orange, Green & Red x3, Red & Yellow x2, Red & Blue x2, Yellow & Blue, Yellow & Orange x2.
Unlockable: All Songs (Quick Play Mode)
To unlock all of the game's songs for Quick Play Mode, insert the following notes in the Options menu: Yellow & Orange, Red & Blue, Red & Orange, Green & Blue, Red & Yellow, Yellow & Orange, Red & Yellow, Red & Blue, Green & Yellow x2, Yellow & Blue x2, Yellow & Orange x2, Yellow & Blue, Yellow, Red, Red & Yellow, Red, Yellow, Orange.
Unlockable: Songs (Normal)
To unlock songs in the normal fashion, simply pass the song successfully. It will thereafter be unlocked.
Unlockable: Guitarists
You can unlock Tom Morello (of Rage Against the Machine), Slash (of Guns N Roses/Velvet Revolver), Lou (the Devil in the game), and a character called MetalHead by beating them in the game and then purchasing them for $10,000 (Lou costs $15,000).
