Here is the full list of all 31 Rhythm Sprout: Sick Beats & Bad Sweets achievements.
Got all achievements in Rhythm Sprout!
Get 25 CDs.
Get to the finish line with every unlockable skin.
Get 10 CDs.
Die several times in a row.
Listen to the same loop over and over again.
Hit 20 Trap Notes in one level.
Clear 10 Levels in Turbo Mode.
Clear 5 Levels in Random Mode.
Clear 5 Levels in Mirror Mode.
Answered NO on every question at least once.
Answered YES on every question at least once.
Be very interested in Sugar Daddy's story.
Rewatched a cutscene multiple times.
Clear All Bonus Levels.
Wear an unlockable skin for multiple levels.
Finish the Side Story.
Defeat Mrs. Chili.
Defeat The Power Peppers.
Your love of trap doors knows no bounds.
Finish the Main Story.
Defeat K-FLOW.
Get 100 Stars.
Get one of the Target Scores in any level (no more, no less).
"Defeat" King Sugar Daddy.
Defeat Candy Mama.
Get 50 Stars.
Defeat Count Arelle.
Fall through Count Arelle's trap door.
Get your first CD.
Cleared the first level.