Guitar Hero II Cheats

Here is how you can unlock additional Basses in Co-Op mode.
Unlockable --> How to Unlock
Gibson SG Bass --> Beat 10 Songs in Co-Op mode
Gibson Grabber--> Beat 20 Songs in Co-Op Mode
Gibson Thunderbird--> Beat 30 Songs in Co-Op mode

At the title menu, enter the code.
Cheat--> Effect
Yellow, Yellow, Blue, Yellow, Yellow, Orange, Yellow, Yellow--> Performance mode (Guitar God Mode?)
Orange, Blue, Orange, Yellow, Orange, Blue, Orange, Yellow--> 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,BO,O,B --> Horse Head
B,O,Y,O,Y,O,B --> Crowd has Eyeball Heads
O,B,Y,Y,O,B,Y,Y --> Crowd has Monkey Heads

U unlock everything guitars,songs,everything!
note:saving is disabled...that means that it wont save your progress

Enter at the main menu

Title screen mode selection

Follow

(HAVE TO HAVE GAME SHARK)