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