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