Full list of all 50 Guitar Hero II achievements worth 1,000 gamerscore. It takes around 50-60 hours to unlock all of the achievements on Xbox 360.
Got 300,000 points in a song
Unlocked RedOctane Club
Earned five stars on all songs in the Medium tour
Earned five stars on all songs in the Hard tour
Got 100% notes hit on a song
Beat Trogdor and Thunder Horse
Bought all guitars
Bought all songs
Bought all characters
Spent $10,000 at the store
Beat all the unlock songs
Got a 500 note streak in Cooperative
Got 500,000 points in a song
Got 400,000 points in a song
Beat Jordan on Expert
Got a 1000 note streak
Got 1,000,000 points on a song in Cooperative
Got 800,000 points on a song in Cooperative
Got 600,000 points on a song in Cooperative
Got a 1000 note streak in Cooperative
Beat the Expert tour
Bought all outfits
Got a 500 note streak
Got 400,000 points on a song in Cooperative
Got 100% notes hit on a song in Cooperative
Got 200,000 points on a song in Cooperative
Got an 8x streak in Cooperative
Got a 100 note streak in Cooperative
Bought all guitar finishes
Beat the Hard tour
Earned five stars on all songs in the Easy tour
Beat the Easy tour
Got 200,000 points in a song
Beat the Medium tour
Viewed the credits
Practiced three different songs
Unlocked Stonehenge
Unlocked Harmonix Arena
Unlocked Vans Warped Tour
Got 100,000 points in a song
Got a 100 note streak
Unlocked Rock City Theater
Got an 8x multiplier
Completed all tutorials
Unlocked Blackout Bar
Failed a song on Easy
Unlocked Rat Cellar
Refused to play an encore
Beat a song with lefty flip on
Earn five stars on all songs in the Expert tour