Full list of all 50 Guitar Hero: Metallica achievements worth 1,000 gamerscore. It takes around 50-60 hours to unlock all of the achievements on Xbox 360.
You completed the career in a band (2-4 player band)
You completed the career as the vocalist
You completed all the instrument careers
You completed the career as the bassist
You completed the career as the drummer
You hit every star power phrase in the song Orion
You rocked out as King Diamond
You rocked out as Lemmy
You completed a song in every venue
You earned $15,000
You won an online Face-Off match
You won an online Face-Off match by 25,000 points or more
You won an online Pro Face-Off match
You won an online Pro Face-Off match by 25,000 points or more
You performed as the vocalist
You completed a song at The Stone venue
You completed an instrument career on Expert
You completed the career as the guitarist
You viewed a Metallifacts video
You recovered from a poor performance in Quickplay or Career
You completed a song in every In-the-Round venue
You earned 100 stars in Band Career or a single instrument Career
You performed as the drummer
You performed as the bassist
You completed a song at the Ice Cave venue
You downloaded a song from GHTunes
You created a new custom rocker
You created a new custom instrument
You completed a song on Hard or Expert in local Quickplay or Career
You performed as the guitarist
Complete the Tutorials
You triggered star power simultaneously (4 player band)
Earn a band Hot Streak (4 player band)
100% a song (4 player band)
Earn the highest individual score on a song in a band (4 player band)
Complete a song in a band in Quickplay or Career (4 players)
Complete a song with all band members on expert in Quickplay or Career (4 player band)
Win an online Band v Band match (8 players)
Play 20 online matches
Create a new custom tattoo
Create a new custom band logo
Complete a song on Expert + in Quickplay or Career (drums only)
Score 575,000 on the song Creeping Death as the guitarist
Score 450,000 on the song Dyer's Eve as the drummer
Score 340,000 on the song Fight Fire with Fire as the bassist
Score 65,000 on the song Stone Cold Crazy as the vocalist
Score 330,000 on the song Enter Sandman on guitar
Score 1,000,000 on the song Battery as a band (4 players)
Win an online battle match with the Fade to Black power up