Guitar Hero Geek

(G=Green, R=Red, Y=Yellow, B=Blue, O=Orange)
At the main menu, select “Options”, “Cheats”, “Enter New Cheat”, then enter one of the following codes to unlock the corresponding cheat option:

Code

Effect

YYBRBGRR

Performance Mode

GBRYYRGG

Hyperspeed

YGRBBBB

Auto Kick

BBRGGBBY

Unlock Quickplay

BRYYYYYG

Aaron

GRBGRBBG

Nick

BRBBYYYG

Johnny Viper

BRGGYYYG

Rina

RRBYGYYYG

Air Instruments

GRYYYBBG

Invisable Characters

YGRRGBRY

AT&T Ballpark

BRRGRGRY

Gem Color

GRGBRRYB

Flame Color

RRYRBRRB

Star Color

RGGYBGYB

Vocal Fireball

GGRRYRYB

Always Slide

GRYBRYBG

Extra Line 6 Tones

From the main menu, go to “Options”, then “Cheats”, then “Enter Cheat”. Then play the following notes, you must strum every note/chord.
(G=Green, R=Red, Y=Yellow, B=Blue, O=Orange)

Code
Effect

(BY) (GY) (GY) (RB) (RB) (RY) (RY) (BY) (GY) (GY) (RB) (RB) (RY) (RY) (GY) (GY) (RY) (RY)
Air guitar

(GR) (GR) (GR) (GB) (GB) (GB) (RB) R [...]

From the main menu, go to “Options”, then “Cheats”, then “Enter Cheat”. Then play the following notes, you must strum every note/chord.
(G=Green, R=Red, Y=Yellow, B=Blue, O=Orange)

Code
Effect

(BY) (GY) (GY) (RB) (RB) (RY) (RY) (BY) (GY) (GY) (RB) (RB) (RY) (RY) (GY) (GY) (RY) (RY)
Air Guitar

(GR) (GY) (YB) (RB) (BO) (YO) (RY) (RB)
Easy Expert [...]

B=Blue O=Orange Y=Yellow)

Cheat
Effect

Y, Y, B, Y, Y, O, Y, Y
Performance mode (Guitar God Mode?)

O, B, O, Y, O, B, O, Y
Hyper Speed De/Activate

Y, Y, B, O, Y, B
Air Guitar

O, Y, O, O, Y, O, Y, Y
Flaming Head

B, O, O, B, O, O, B, O, O, B
Horse Head

B, O, Y, O, Y, O, B
Crowd has Eyeball [...]