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.

Air instruments
Press Red(2), Blue, Yellow, Green(3), Yellow.

Always Drum Fill
Press Red(3), Blue(2), Green(2), Yellow.

Always Slide
Press Green(2), Red(2), 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(4), Red. This mode automatically plays the bass pedal for the drummer. It has no effect online.

Black Highway
Press Yellow, Red, Green, Red, Green, Red(2), Blue.

Flame Color
Press Green, Red, Green, Blue, Red(2), Yellow, Blue.

Gem Color
Press Blue, Red(2), Green, Red, Green, Red, Yellow.

Hyperguitar, Hyperbass, and Hyperdrums
Press Green, Blue, Red, Yellow(2), Red, Green(2).

Invisible Rocker
Press Green, Red, Yellow(3), Blue(2), Green.

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(2), Yellow, Red, Green.

Performance mode
Press Yellow(2), Blue, Red, Blue, Green.

Star Color
Press Red(2), Yellow, Red, Blue, Red, Red, Blue.

Vocal Fireball
Press Red, Green(2), Yellow, Blue, Green, Yellow, Green.