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.
Become the Trombone Champ of Legend
Abstain from tooting
Abstain from sound completely
Unlock all trombone colors
Get 50 Tromboner Cards
Receive an "S" score on twenty or more tracks
Turd your last Mozart card
Unlock all Sound Sets
Meet Bassmaster Ben
Receive an "S" score on fifteen tracks
Unlock a Sound Set
Play at least 20 tracks
Meet Tootmaster Tom
Receive an "S" score on ten tracks
Unlock a trombone color
Meet a Mysterious Friend
Express your love of baboons
Receive an "S" score on five tracks
Develop an enormous brain full of facts
Get a sack
Receive an "S" score on one track
Receive an "S" score on thirty or more tracks
Receive an "S" score on twenty-five or more tracks