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