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