Here is the full list of all 16 Claire achievements.
Unlock the Dog ending.
Find 80 items.
Unlock the ending.
Unlock the ending on Nightmare.
Unlock the Good ending.
Find all butterflies.
Defeat the Glower.
Find all notes.
Make it to the apartments.
Unlock the otherworld scene.
Find each delinquent scene.
Make it to the school.
Answer the phone.
Find 3 notes.
Have maximum panic.
Find 3 butterflies.