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