Now we’ll look at how to gain access to the master bedroom and finally to Aristide herself, the wretched being. Be prepared for some Wade induced hallucinations and manic pyrokinesis by the baby-grand piano, right at the end. Bring your sunglasses for this one.
After the pool-room cut-scene you can head through the door, as Genevieve tells you. Alma’s apparition will guide you, as a new objective becomes available (find the hidden door).
Head for the door straight ahead, then through the corridor, and get ready to shoot. You can use the wall or pillars as a shield; head for the staircase afterwards (one more guy up is up there). There are some health packs in the middle of the room.
Find the bedroom and head straight for the box on the shelves: it will open a secret space. Go inside, head right, then down the steel-steps and the door will open; listen to the dialogue.
Now general psychic meltdown ensues; Aristide disintegrates and I suggest you get out of there quickly, although there's not much can stop the pesky psychic. Head out the same way you came from, into the sitting-room with the baby-grand piano, and enjoy the final sequence for this act.