Here is the full list of all 50 Guitar Hero: World Tour achievements worth 1,000 gamerscore.
You performed as a Vocalist
You downloaded a few songs from GHTunes
You completed the majority of the gigs. Just a few more to go.
You completed an Xbox LIVE 2 v 2 Pro Face-Off match
You created a male band member
You rocked out as Jimi Hendrix
You completed a gig
You performed as a Guitarist
You completed a song solo
You completed a tutorial
Perform as a Drummer (Band or Solo)
Upload a song to GHTunes
Complete an Xbox LIVE Battle Mode match win or lose
Complete an Xbox LIVE Band v Band match (win or lose)
Perform as every instrument at least once (Vocals, Lead, Bass & Drums)
Complete a song in a band (4 player band)
All band members get a 50 note streak at the same time (4 player band)
Complete a Career on easy (Band or Solo)
Complete a solo career (any difficulty)
Earn $1,000,000 in lifetime earnings
Complete a band career (any difficulty)
Complete a Career on medium (Band or Solo)
100% a song as a band (4 player band)
100% a song as a band, hard or expert only (4 player band)
Complete a Career on hard (Band or Solo)
Complete a Career on expert (Band or Solo)
Complete all instrument careers - any difficulty (Band or Solo)
Create a custom tattoo
Create your own custom drums
You performed as every instrument at least once
Create your own band logo
Create a female band member
Rock out as Ozzy Osbourne in any venue
Rock out as Hayley Williams in any venue
Rock out as Ted Nugent in any venue
Rock out as Travis Barker in any venue
Rock out as Billy Corgan in any venue
Rock out as Zakk Wylde in any venue
Rock out as the Rockubot in any venue
Rock out as the Skeleton in any venue
You got the highest score in a band as the lead or bass guitar
Get the highest score in the band as the vocalist (4 player band)
All band members use star power at the same time (4 player band)
All band members earn an 8x multiplier at the same time (4 player band)
Unlock all of the guitars
Score 222,222 or higher on the song Satch Boogie as the Lead Guitarist (Solo)
Score 222,222 or higher on the song Assassin as a Drummer (Solo)
Score 123,450 or higher on the song Beat It as a Vocalist (Solo)
Score 444,444 or higher on the song Schism in a band (4 player band)
Score 444,444 or higher on the song Trapped Under Ice (4 player band)