Guitar Hero II PS2 Cheats

Unlock All: 

Press blue, yellow, orange, red, orange, yellow, red, yellow, red, yellow, red, yellow, red, yellow, red, yellow at the main menu


Air guitar mode:

 Press Yellow, Yellow, Blue, Orange, Yellow, Blue at the main menu.  
Performance mode:

 Press Yellow, Yellow, Blue, Yellow, Yellow, Orange, Yellow, Yellow at the main menu. 
Hyper speed mode:

 Press Orange, Blue, Orange, Yellow, Orange, Blue, Orange, Yellow at the main menu.  Repeat the code to disble it. 
Eyeball head crowd:

 Press Blue, Orange, Yellow, Orange, Yellow, Orange, Blue at the main menu.  
Monkey head crowd:

 Press Orange, Blue, Yellow, Yellow, Orange, Blue, Yellow at the main menu.  
Flaming head:

 Press Orange, Yellow, Orange, Yellow, Orange, Yellow at the main menu.  
Horse head:

 Press Blue, Orange, Orange, Blue, Orange, Orange, Blue, Orange, Orange, Blue at the main menu.  
Pro-Face Off mode:

 Beat the game under medium difficulty.  This mode has both players play the same notes. 
Master hyper speed :

go to the main menu and press these frets: orange,blue,blue,yellow,red ,blue,yellow



 Unlockable guitars: 

"Snaketapus" Guitar	Beat Hard Mode
"The Log" Guitar	5-Star every song on Expert
Battle Axe Guitar	Beat Expert Mode
Casket Guitar	Beat Medium Mode
Eyeball Guitar	5-Star every song on Hard
Fish Guitar	Beat Easy Mode
USA Guitar	5-Star every song on Easy
Viking Guitar	5-Star every song on Medium

Unlockable basses:

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

Grim Ripper plays Les Paul:

This cheats works with Career mode. If you don't have the Grim Ripper, go buy him from the store. Choose the Grim Ripper as your character, go all the way back to the main menu, then re-enter your career. The Grim Ripper should now be playing a Les Paul.

Anyone plays the Scythe:

This also happens in Career mode. If you don't have the Grim Ripper, get him from the shop. Go to any difficulty setting and choose anyone who's not the Grim Ripper. Then, go to another difficulty level and choose the Grim Ripper. Finally, go back to your original difficulty setting, and whatever character you picked should be playing the Scythe.

5 Star 100% Glitch:

Go to practice at the main menu. Pick any song you know you can play a part of perfectly, on any difficulty or speed. The part you pick has to be AT LEAST 30 notes long. Choose lead. Play the part you picked perfectly. After the part ends unplug your guitar after 2 seconds, plug it back in. If the chords are still moving without the notes you got it. If it just says you beat it restart and try again. Also try unplugging and re- plugging a few times. 10 times is usually a guarantee. Once your strings are rolling with no notes, exit out and go into a new career. Start your first song, it will start with no noise or vocals and the instrumentals will be high pitched. Play the part you practiced perfectly and when your done let the song finish on it's own. When it's done your progress screen will show 5 stars and 100% completed. Continue onto the next song. To turn the glitch off and play normally just restart your PS2.

Thanks to Revolution Readers Les_Paul, Fretta, bowly, Ricky D and the rat!