Here is the full list of all 10 Momodora: Reverie Under the Moonlight achievements worth 1,000 gamerscore.
Finish a playthrough on "Insane" difficulty.
Watch the True Ending.
Finish a playthrough without killing any common enemies.
Find all Ivory Bugs and bring them to the bunny florist.
Finish a playthrough without dying.
Defeat Archpriestess Choir.
Find all Vitality Fragments.
Give a Dirty Shroom to an Imp girl.
Complete 100% of the map.
Completed all other achievements.