Here is the full list of all 32 The Metronomicon: Slay The Dance Floor achievements.
Save the world of Koras from Dancemageddon.
Unlock Sara's laboratory.
Decompile a fearsome Dance-o-bot.
Kill five enemies in a row with a single attack.
Succeed in beating five sidequests.
Make five arena challenges your chump
Conquer one challenge in the school arena.
Perform a perfect meteor attack counter.
Unlock your first bonus song.
End the dancing of a great Candy Dragon.
Dethrone the Wraith King in the Haunted Kingdom.
Attain a 300 note streak.
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.
Succeed in your first story sidequest.
Attain a 100 note streak.
Beat the final challenge's omega boss.
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.
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.
Beat a fifty song playlist without ever pausing.