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 as the drummer
You completed all the instrument careers
You performed as the drummer
You completed a song on Expert + in Quickplay or Career (drums only)
Drummed every green note and finished the song Blood and Thunder with the rock meter in green
You scored 450,000 on the song Dyer's Eve as the drummer
You completed the career as the vocalist
You viewed a Metallifacts video
You completed a song in every venue
You completed the career in a band (2-4 player band)
You completed the career as the bassist
You rocked out as King Diamond
You rocked out as Lemmy
You created a new custom band logo
You created a custom tattoo
You created a new custom instrument
You performed as the vocalist
You scored 330,000 on the song Enter Sandman on guitar
You earned 100 stars in Band Career or a single instrument Career
You completed the career as the guitarist
You completed an instrument career on Expert
You scored 575,000 on the song Creeping Death as the guitarist
You performed as the bassist
You earned $15,000
You hit every star power phrase in the song Orion
You completed a song at The Stone venue
You played 20 online matches
You scored 1,000,000 on the song Battery as a band
You completed a song in every In-the-Round venue
You won a Band v Band match (8 players)
You recovered from a poor performance in Quickplay or Career
You completed a song with all band members on expert in Quickplay or Career (4 player band)
You completed a song in a band in Quickplay or Career (4 players)
You scored the highest individual score on a song in a band
You earned a band Hot Streak
You triggered star power simultaneously (4 player band)
You completed a song at the Ice Cave venue
You won a battle match with the Fade to Black power up
You won an online Face-Off match by 25,000 points or more
You won an online Face-Off match
You downloaded a song from GHTunes
You created a new custom rocker
You performed as the guitarist
You completed a song on Hard or Expert in local Quickplay or Career
You won an online Pro Face-Off match by 25,000 points or more
You won an online Pro Face-Off match
Complete the Tutorials
100% a song (4 player band)
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