Here are some cheats for Guitar Hero II’s XBOX 360 version…. Cheater!

Enter The Following Cheats in the main menu of the game.

Hyper speed mode:
Press Blue, Orange, Yellow, Orange, Blue, Orange, Yellow, Yellow. Repeat the code to disable.

Performance mode:
Blue, Blue, Yellow, Blue, Blue, Orange, Blue, Blue. Everything else will disappear with the exception of the performance.

Air guitar mode:
Yellow, Blue, Yellow, Orange, Yellow, Blue.

Eyeball head crowd:
Yellow, Orange, Blue, Blue, Blue, Orange, Yellow.

Flaming head:
Orange, Yellow, Yellow, Orange, Yellow, Yellow, Orange, Yellow, Yellow, Blue, Yellow, Yellow, Blue, Yellow, Yellow.

Monkey head crowd:
Press Orange, Yellow, Blue, Blue, Yellow, Orange, Blue, Blue.

Unlock All Guitars:
Orange, Orange, Yellow, Green, Red, Blue. Must repeat 5 times for code to work.

Unlockable Guitars
“The Log” Guitar Get 5-stars on every song on Expert
Axe Guitar Complete game on Expert
Casket Guitar Complete game on Medium
Eyeball Guitar Get 5-stars on every song on Hard
Fish Guitar Complete game on Easy
Snaketapus Guitar Complete game on Hard
USA Guitar Get 5-stars on every song on Easy
Viking Guitar Get 5-stars on every song on Medium

Unlockable Co-op Basses:
Gibson SG Bass Beat 10 Co-Op songs
Gibson Grabber Beat 20 Co-Op songs
Gibson Thunderbird Beat 30 Co-Op songs
Hofner Bass Beat all Co-Op songs
Lava Pearl Musicman Stingray Get 5 stars on 10 Co-Op songs
Cream SG Get 5 stars on 20 Co-Op songs
Maple Gibson Grabber Bass Get 4 stars on all Co-Op songs
Sunburst Gibson Thunderbird Bass Get 5 stars on all Co-Op Songs