Here is the full list of all 50 Guitar Hero: World Tour achievements worth 1,000 gamerscore.
You completed a tutorial
You completed a song solo
You performed as a Drummer
You performed as a Guitarist
You completed a gig
You completed Career on easy. Have you tried medium yet?
You completed a solo career
You completed the majority of the gigs. Just a few more to go.
You completed Career on medium. Have you tried hard 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 Jimi Hendrix
You rocked out as Travis Barker
You performed as a Vocalist
You performed as every instrument at least once
You completed a song in a band
You completed a band career
You completed Career on hard. Have you tried expert yet?
You completed all of the instrument careers
You rocked out as Ozzy Osbourne
You rocked out as Hayley Williams
You rocked out as Ted Nugent
You rocked out as Billy Corgan
You rocked out as Zakk Wylde
You rocked out as the Skeleton
Get the highest score in the band as the lead or bass guitar (4 player band)
You downloaded a few songs from GHTunes
You completed Career on expert
Upload a song to GHTunes
Complete an Xbox LIVE 2 v 2 Pro Face-Off match (win or lose)
Complete an Xbox LIVE Battle Mode match win or lose
Complete an Xbox LIVE Band v Band match (win or lose)
All band members get a 50 note streak at the same time (4 player band)
Earn $1,000,000 in lifetime earnings
100% a song as a band (4 player band)
100% a song as a band, hard or expert only (4 player band)
Rock out as the Rockubot in any venue
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)