Here is the full list of all 32 The Metronomicon: Slay The Dance Floor achievements.
Survive a story song without healing any party member.
Survive a story song without killing an enemy.
Beat the final challenge's omega boss.
Succeed in every single sidequest.
Survive every song in Story Mode.
Save the world of Koras from Dancemageddon.
Deal at least 5000 hp damage in one strike as Gwen.
Decompile a fearsome Dance-o-bot.
Unlock Sara's laboratory.
End the dancing of a great Candy Dragon.
Kill five enemies in a row with a single attack.
Dethrone the Wraith King in the Haunted Kingdom.
Succeed in beating five sidequests.
Make five arena challenges your chump
Attain a 300 note streak.
Conquer one challenge in the school arena.
Survive your first 10 songs in Story Mode.
Destroy the Speyeder of the Wild Forest.
Perform a perfect meteor attack counter.
Unlock your first bonus song.
Perform a perfect Solo-Lane Team Attack.
Succeed in your first story sidequest.
Perform your first upgrade to the school.
Attain a 100 note streak.
Defeat every arena challenge.
Defeat every arena challenge on hard.
Survive every song in Story Mode on Hard.
Purchase every ultimate weapon.
Apply six buffs to one hero at the same time.
Beat a fifty song playlist without ever pausing.