Guitar Hero: Metallica

Select "Cheats" at the main menu, then "Enter New Cheat". Enter one of the following codes to unlock the corresponding cheat option at the menu. A message will confirm correct code entry.

*Line 6 effects:
Press Green, Red, Yellow, Blue, Red, Yellow, Blue, Green. This unlocks additional Line 6 effects in the Music Studio.

*Metallica Costumes:
Press Green, Red, Yellow, Blue, Blue, Yellow, Red, Green.

*Hyperguitar, Hyperbass, and Hyperdrums:
Press Green, Blue, Red, Yellow, Yellow, Red, Green, Green.

*Performance mode:
Press Yellow, Yellow, Blue, Red, Blue, Green.

*Invisible Rocker:
Press Green, Red, Yellow, Yellow, Blue, Blue, Green.

*Air instruments:
Press Red, Red, Blue, Yellow, Green, Green, Green, Yellow.

*Always Slide:
Press Green, Green, Red, Red, Yellow, Red, Yellow, Blue. This turns all guitar notes (not chords) into touch pad sliding notes connected by purple lines. It has no effect online.

*Auto Kick:
Press Yellow, Green, Red, Blue, Blue, Blue, Blue, Red. This mode automatically plays the bass pedal for the drummer. It has no effect online.

*Always Drum Fill:
Press Red, Red, Red, Blue, Blue, Green, Green, Yellow.

*Gem Color:
Press Blue, Red, Red, Green, Red, Green, Red, Yellow.

*Flame Color:
Press Green, Red, Green, Blue, Red, Red, Yellow, Blue.

*Star Color:
Press Red, Red, Yellow, Red, Blue, Red, Red, Blue.

*Vocal Fireball:
Press Red, Green, Green, Yellow, Blue, Green, Yellow, Green.

*Black Highway:
Press Yellow, Red, Green, Red, Green, Red, Red, Blue.