Here is the full list of all 15 P R I S M - there are A Visual Novel achievements.
Spend your first night at the inn
Meet everyone in the Umbra home
Have a monstrous encounter in the woods
Listen to Martha's story
Have your first lesson with Anon
Have your second lesson with Anon
Spend time with Mira and Cain
Spend time with the Fentons but leave empty-handed
Receive a new gift from Lara and Lucah
Discover the truth about the monsters
Fail to protect yourself from Anon
Meet Father
Fail in helping the townsfolk become human once more
Help Father pass on peacefully
Finish the game with the Good Ending