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