The Legacy of the Moonspell Add-on for Vampire Survivors has 18 achievements.
Find and open the coffin in Mt.Moonspell.
Survive 15 minutes with Miang.
Evolve the Silver Wind.
Survive 15 minutes with Menya.
Evolve the Four Seasons.
Survive 15 minutes with Syuuto.
Evolve the Summon Night.
Survive 15 minutes with Babi-Onna.
Evolve the Mirage Robe.
Survive 15 minutes with McCoy-Oni.
Defeat 100000 enemies in a single run with Menya.
Defeat 100000 enemies in a single run with Syuuto.
Defeat a total of 6000 Kappa.
Find a Night Sword.
Evolve the Night Sword.
Defeat the Orochimario in Mt.Moonspell.
Evolve the Mille Bolle Blu.
Find the Mt.Moonspell Map.