Full list of all 49 Band Hero achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
My 1st hit
Grabbed 333 Career Stars
Played through all the Band Hero songs once
Another notch on the belt
Been around the block
3/4 of the way there
Found the pot of gold
Found Secret Notes 10 (Love is a Battlefield)
Found Secret Notes 4 (Take What You Take)
Found Secret Notes 15 (So Yesterday)
Found Secret Notes 16 (Ocean Avenue)
Found Secret Notes 9 (Lips of an Angel)
Found Secret Notes 5 (Like Whoa)
Found Secret Notes 3 (Honky Tonk Women)
Found Secret Notes 2 (Black Cat)
Found Secret Notes 1 (Beautiful Soul)
Earned some bling
Met all of the Stars
Found Secret Notes 14 (YMCA)
Found Secret Notes 11 (Don't Speak)
1/2 of the way there
Found Secret Notes 6 (She Will Be Loved)
Grabbed 111 Career Stars
1/4 of the way there
Found Secret Notes 13 (Wannabe)
Found Secret Notes 17 (Dirty Little Secret)
Found Secret Notes 12 (I Heard it Through the Grapevine)
Found Secret Notes 18 (Oh, Pretty Woman)
Found Secret Notes 7 (Let's Dance)
Found Secret Notes 8 (Bring Me to Life)
Rocked out as an Avatar
Scored over 10,000 in Star Power
Found Secret Notes 19 (Kung Fu Fighting)
Completed a Band Moment successfully
Rocked a gig
Complete the Tutorials
Earn 555 Stars in Career
Earn Diamond level on a Career Challenge
Host an online Career game and play a song
Complete 25 online Pro Face-Off matches, win or lose
Play an online Do or Die game
Complete 50 of the Career Challenges at Platinum or Diamond
Score over 1,000,000 points as a band in any single song in Career or Quickplay
100% a song as a vocalist
Complete at least one challenge for every instrument at Gold level or better
Complete a song with 4 players without any members failing on expert in Career or Quickplay
Complete a song as 4 of the same instrument on any difficulty in Quickplay or Career
Earn an 11x multiplier
Streak through an entire song without missing a note on medium or harder difficulty