Full list of all 25 Trombone Champ achievements. It takes around 5-6 hours to unlock all of the achievements in the base game on Windows.
The base game contains 21 achievements, and there are 2 DLC packs containing 4 achievements.
Receive an "S" score on twenty or more tracks
Receive an "S" score on fifteen tracks
Become the Trombone Champ of Legend
Unlock all Sound Sets
Unlock all trombone colors
Receive an "S" score on ten tracks
Get 50 Tromboner Cards
Unlock a Sound Set
Play at least 20 tracks
Unlock a trombone color
Abstain from tooting
Turd your last Mozart card
Abstain from sound completely
Develop an enormous brain full of facts
Meet Bassmaster Ben
Meet a Mysterious Friend
Receive an "S" score on five tracks
Meet Tootmaster Tom
Get a sack
Receive an "S" score on one track
Express your love of baboons
Receive an "S" score on twenty-five or more tracks
Receive an "S" score on thirty or more tracks