Here is the full list of all 19 Demonologist achievements.
Play on the Kurosawa House map
Exorcise the ghost in the Bedlam
Play on the Bedlam map
Revive your friend with a Tarot Card.
Successfully joined the "family."
Exorcise the ghost 5 times.
Take Two Photos Of The Ghost.
Correctly identify the ghost 3 times.
Exorcise the ghost once.
Purchase Two Crucifix
Play on the Hospital map
Buy the Pub.
Buy the Lighthouse.
Play on the Cyclone Street map.
Play on the Abandoned House map.
Read EMF Level 5.
Die once.
Correctly identify the ghost once.