Here is the full list of all 19 Momodora: Moonlit Farewell achievements.
Obtain every Sigil in one save file.
Help Hazelia free every Lumen Fairy in one save file.
Bring peace to Koho.
Visit every space in the map in one save file.
Obtain every Illusory Companion in one save file.
Eat every Lun Berry in one save file.
Obtain every Heavenly Lily in one save file.
Defeat a major enemy without taking damage.
Eat every Dotted Berry in one save file.
Obtain every Grimoire in one save file.
Reach maximum friendship with Cereza in one save file.
Eat every Peach in one save file.
Destroy every Lunar Crystal Repository in one save file.
Pet many cats.
Obtain every relic in one save file.
Earn every title.
Finish the story in Hardcore mode.
Reach 111% completion in one save file.
Finish the story in Arrange mode.