Guitar Hero: Metallica Cheats

Cheat Codes
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.

Press Redx2, Blue, Yellow, Greenx3, Yellow: Air instruments
Press Redx3, Bluex2, Greenx2, Yellow: Always Drum Fill
Press Yellow, Red, Green, Red, Green, Redx2, Blue: Black Highway
Press Green, Red, Green, Blue, Redx2, Yellow, Blue: Flame Color
Press Blue, Redx2, Green, Red, Green, Red, Yellow: Gem Color
Press Green, Blue, Red, Yellowx2, Red, Greenx2: Hyperguitar, Hyperbass, and Hyperdrums
Press Green, Red, Yellowx3, Bluex2, Green: Invisible Rocker
Press Green, Red, Yellow, Bluex2, Yellow, Red, Green: Metallica Costumes
Press Yellowx2, Blue, Red, Blue, Green: Performance mode
Press Redx2, Yellow, Red, Blue, Red, Red, Blue: Star Color
Press Yellow, Green, Red, Bluex4, Red: This mode automatically plays the bass pedal for the drummer. It has no effect online.
Press Greenx2, Redx2, 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
Press Green, Red, Yellow, Blue, Red, Yellow, Blue, Green: This unlocks additional Line 6 effects in the Music Studio
Press Red, Greenx2, Yellow, Blue, Green, Yellow, Green: Vocal Fireball

Achievements
Complete each achievement to get the allotted gamerscore.

...And Justice for All (50): Earn 100 stars in Band Career or any single instrument Career
2 X 4 (10): Earn a band Hot Streak (4 player band)
Astronomy (10): You hit every star power phrase in the song Orion
Battery (30): You scored 1,000,000 on the song Battery as a band
Better Than You (10): Win an online Pro Face-Off match
Black (10): Win an online battle match with the Fade to Black power up
Blackened (5): You created a custom tattoo
Blitzkrieg (10): Win an online Band v Band match (8 players)
Creeping Death (30): You scored 575,000 on the song Creeping Death as the guitarist
Cure (5): You recovered from a poor performance in Quickplay or Career
Damage Inc. (5): You performed as the drummer
Disposable Heroes (5): You created a new custom rocker
Dyer's Eve (30): You scored 450,000 on the song Dyer's Eve as the drummer
Enter Sandman (30): You scored 330,000 on the song Enter Sandman on guitar
Eye of the Beholder (5): You created a new custom band logo
Fight Fire with Fire (30): You scored 340,000 on the song Fight Fire with Fire as the bassist
Fixxxer (5): You created a new custom instrument
Green Hell (15): Drummed every green note and finished the song Blood and Thunder with the rock meter in green
Hero of the Day (30): Complete a song on Expert + in Quickplay or Career (drums only)
Holier Than Thou (150): Complete all instrument careers
Invisible Kid (5): You performed as the bassist
James Hetfield (25): Complete the career as the vocalist
King Diamond (5): You rocked out as King Diamond
Kirk Hammett (25): Complete the career as the guitarist
Lars Ulrich (25): Complete the career as the drummer
Lemmy (5): You rocked out as Lemmy
Master of Puppets (10): You scored the highest individual score on a song in a band
Metal Militia (30): 100% a song (4 player band)
Metallica (75): Complete any instrument career on Expert (Guitar, Bass, Vocals, Drums or Band)
Motorbreath (5): You performed as the vocalist
Nothing Else Matters (50): Complete the career in a band (2-4 player band)
One (10): Complete a song with any instrument on Hard or Expert in local Quickplay or Career
Reload (5): Download a song from GHTunes
Ride the Lightning (10): You triggered star power simultaneously (4 player band)
Robert Trujillo (25): Complete the career as the bassist
Seek & Destroy (25): Play 20 online matches
Some Kind of Monster (5): You performed as the guitarist
Stone Cold Crazy (30): You scored 65,000 on Stone Cold Crazy as the vocalist
Stone Dead Forever (5): You completed a song at The Stone venue
The Ecstacy of Gold (50): Earn $15,000
The Four Horsemen (20): Complete a song with all band members on expert in Quickplay or Career (4 player band)
The House Jack Built (10): You completed a song in every In-the-Round venue
The Memory Remains (5): View a Metallifacts video
The More I See (5): Complete the Tutorials
The Struggle Within (10): Complete a song in a band in Quickplay or Career (4 players)
The Unforgiven (10): Win an online Face-Off match
The Unforgiven II (10): You won an online Face-Off match by 25,000 points or more
The Unforgiven III (10): You won an online Pro Face-Off match by 25,000 points or more
Trapped Under Ice (5): You completed a song at the Ice Cave venue
Wherever I May Roam (15): Complete a song in every venue