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