Here is the full list of all 31 Rhythm Sprout: Sick Beats & Bad Sweets achievements.
Got all achievements in Rhythm Sprout!
Die several times in a row.
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.
Get 25 CDs.
Wear an unlockable skin for multiple levels.
Get to the finish line with every unlockable skin.
Clear 10 Levels in Turbo Mode.
Hit 20 Trap Notes in one level.
Clear 5 Levels in Mirror Mode.
Clear 5 Levels in Random Mode.
Clear All Bonus 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.
"Defeat" King Sugar Daddy.
Defeat Candy Mama.
Listen to the same loop over and over again.
Get 10 CDs.
Get 50 Stars.
Defeat Count Arelle.
Fall through Count Arelle's trap door.
Cleared the first level.
Get your first CD.
Get one of the Target Scores in any level (no more, no less).