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