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