Guitar Hero II 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.