Here is the full list of all 50 Guitar Hero: World Tour achievements worth 1,000 gamerscore.
You scored 123,450 or higher on the song Beat It as a Vocalist
You completed an Xbox LIVE Battle Mode match
You completed an Xbox LIVE 2 v 2 Pro Face-Off match
You got 100% on a song in a band
All band members activated star power at the same time
You earned an 8x multiplier with the rest of the band at the same time
All band members got a 50 note streak at the same time
You earned $1,000,000 in lifetime earnings
You rocked out as Ozzy Osbourne
You completed all of the instrument careers
You rocked out as Travis Barker
You rocked out as Ted Nugent
You rocked out as Zakk Wylde
You completed a band career
You completed an Xbox LIVE Band v Band match
You scored 444,444 or more on the song Schism
You uploaded a song to GHTunes
You rocked out as the Rockubot
You downloaded a few songs from GHTunes
You completed Career on expert
You rocked out as Hayley Williams
You performed as every instrument at least once
You completed Career on easy. Have you tried medium yet?
You completed Career on medium. Have you tried hard yet?
You completed Career on hard. Have you tried expert yet?
You created a custom tattoo
You created your own custom drums
You created your own custom guitar
You created you own band logo
You created a female band member
You created a male band member
You rocked out as the Skeleton
You completed a solo career
You rocked out as Jimi Hendrix
You completed a tutorial
You performed as a Vocalist
You completed the majority of the gigs. Just a few more to go.
You completed a song solo
You performed as a Drummer
You performed as a Guitarist
You completed a gig
You completed a song in a band
You rocked out as Billy Corgan
Get the highest score in the band as the lead or bass guitar (4 player band)
100% a song as a band, hard or expert only (4 player band)
Get the highest score in the band as the vocalist (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 444,444 or higher on the song Trapped Under Ice (4 player band)