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