Successfully complete one of the following tasks to get a trophy:

Welcome to Band Hero (Bronze): Complete all of the tutorials.
Rise to Fame (Bronze): Complete 25% of the gigs in Career.
Glimmer (Bronze): Earn 111 Stars in Career.
Platinum Blonde (Bronze): Earn Platinum level on a Career Challenge.
Iced Out (Bronze): Earn Diamond level on a Career Challenge.
My First Gig (Bronze): Complete a Career gig on any difficulty.
M.C. (Bronze): Host an online Career game and play a song.
Face to Face (Bronze): Complete 25 online Pro Face-Off matches, win or lose.
Till Death Do Us Part (Bronze): Play an online Do or Die game.
In the Moment (Bronze): Successfully complete a Band Moment.
Star Light, Star Bright (Bronze): Score over 10,000 points while in a single Star Power deployment in Career or Quickplay.
A Cool Mill (Bronze): Score over 1,000,000 points as a band in any single song in Career or Quickplay.
Studio Time (Bronze): Create a GH Studio song.
Fevered Pitch (Bronze): 100% a song as a vocalist.
Jack of All Trades (Bronze): Complete at least one challenge for every instrument at Gold level or better.
There's no 'I' in 'Band Hero' (Bronze): Complete a song with 4 players without any members failing on expert in Career or Quickplay.
Four of a Kind (Bronze): Complete a song as 4 of the same instrument on any difficulty in Quickplay or Career.
Star Powered (Bronze): Earn an 11x multiplier.
Picture Perfect (Bronze): Streak through an entire song without missing a note on medium or harder difficulty.
Secret Notes 1 (Bronze): "Beautiful Soul" by Jesse McCartney.
Secret Notes 2 (Bronze): "Black Cat" by Janet Jackson.
Secret Notes 3 (Bronze): "Honky Tonk Women" by The Rolling Stones.
Secret Notes 4 (Bronze): "Take What You Take" by Lily Allen.
Secret Notes 5 (Bronze): "Like Whoa" by Aly & AJ.
Secret Notes 6 (Bronze): "She Will Be Loved" by Maroon 5.
Secret Notes 7 (Bronze): "Let's Dance" by David Bowie.
Secret Notes 8 (Bronze): "Bring Me to Life" by Evanescence.
Secret Notes 9 (Bronze): "Lips of an Angel" by Hinder.
Secret Notes 10 (Bronze): "Love is a Battlefield" by Pat Benatar.
Secret Notes 11 (Bronze): "Don't Speak" by No Doubt.
Secret Notes 12 (Bronze): "I Heard It Through the Grapevine" by Marvin Gaye.
Secret Notes 13 (Bronze): "Wannabe" by Spice Girls.
Secret Notes 14 (Bronze): "Y.M.C.A." by Village People.
Secret Notes 15 (Bronze): "So Yesterday" by Hilary Duff.
Secret Notes 16 (Bronze): "Ocean Avenue" by Yellowcard.
Secret Notes 17 (Bronze): "Dirty Little Secret" by The All-American Rejects.
Secret Notes 18 (Bronze): "Oh, Pretty Woman" by Roy Orbison.
Secret Notes 19 (Bronze): "Kung Fu Fighting" by Carl Douglas.
Nation's Star (Silver): Complete 50% of the gigs in Career.
World Known (Silver): Complete 75% of the gigs in Career.
Sparkle (Silver): Earn 333 Stars in Career.
Shine (Silver): Earn 555 Stars in Career.
Road Most Traveled (Silver): Unlock every venue.
Nice to Meet You (Silver): Complete the gigs and unlock all of the celebrity characters.
A New Challenge Awaits (Silver): Complete 50 of the Career Challenges at Platinum or Diamond.
Testing the Waters (Silver): Play through every Band Hero song once.
The Long Road Ahead (Gold): Complete Career on any difficulty with any instrument.
Treasure Hunt (Gold): Collect all of the Secret Notes.
Platinum Trophy (Platinum): Earn all of the Bronze, Silver and Gold Trophies in Band Hero.