The Legacy of the Moonspell Add-on for Vampire Survivors has 17 achievements worth 95 gamerscore.
Find and open the coffin in Mt.Moonspell.
Survive 15 minutes with Miang Moonspell.
Evolve the Silver Wind.
Survive 15 minutes with Menya Moonspell.
Evolve the Four Seasons.
Survive 15 minutes with Syuuto Moonspell.
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 Moonspell.
Defeat 100000 enemies in a sinle run with Syuuto Moonspell.
Defeat 6000 Kappa.
Find a Night Sword.
Evolve the Night Sword.
Defeat the Orochimario in Mt.Moonspell.
Evolve the Mille Bolle Blu.