I've many a Halloweeny game to recommend to you (Saturnalia, Hob's Barrow, Wytchwood, World Of Horror and even, I suppose, Alan Wake 2, although I'm sort of enjoying it in the wrong way to think of it as a Halloween apropos game) but I'm short on recommendations for myself. I rarely replay games, let alone horror games, which are often one-and-done sorts of things - though I do, of course, enter the Pumpkin Carving Festival every year.
I want something that has a general air of spookiness without being a jumpscare frightfest. If I hadn't played The Tartarus Key already I'd be playing that, is what I'm saying. But the other day I played the demo for An English Haunting and it's exactly what I want. It's just not going to be out for a while. Rats!