Guitar Hero: Aerosmith Codes -

Cheat Codes
Go to "options" and then go to "cheats." Now, cheats are entered completely differently in the third installment. You now have to strum with the frets on just like normal playing! Two or more notes in parentheses indicate a chord:

G=Green, R=Red, Y=Yellow, B=Blue, O=Orange

RY, GR, RY, RY, RB, RB, RB, RB, RB, YB, YB, YO - Air Guitar Cheat Code.
YO, YO, YO, YO, YO, RY, RY, RY, RY, RB, RB, RB, RB, RB, YB, YO, YO - Hyperspeed Code (Adjust the speed at which gems come down the screen).
G, R, G, Y, G, B, G, O, G, B, G, Y, G, R, G, GR, RY, GR, YB, GR, BO, GR, YB, GR, RY, GR, GY - Large Gems code (the gems appear much larger on the fretboard).
GR, B, GR, GY, B, GY, RY, O, RY, GY, Y, GY, GR - No Fail Cheat Code - You can't fail.
GR, GR, RO, RB, GR, GR, RO, RB - Performance Mode Code - The heads up display is disabled.
RY, RB, RB, RY, RY, YB, YB, YB, RB, RY, RB, RB, RY, RY, YB, YB, YB, RB - Precision Mode code (you have to be more precise when hitting the notes).
RY, GR, GR, RY, RY, GR, RY, RY, GR, GR, RY, RY, GR, RY, RB - Unlock all cheat codes.

Unlock Guitars
Walk This Way - Complete Expert Career.
Nine Lives (Daredevil) - Complete Career mode under the Easy difficulty.
Permanent Vacation - Complete the game under the Medium difficulty.
Doubleneck - Get a "5 Star" rank on all songs, except the bonus song, under the Expert difficulty.
Get a Grip - Complete Career mode under the Hard difficulty.
Rock In A Hard Place (Zeitgeist) - Get a "5 Star" rank on all songs, except the bonus song, under the Medium difficulty.
Toys In The Attic (Rocking Horse) - Get a "5 Star" rank on all songs, except the bonus song, under the Easy difficulty.