I'm not sure. I burned through all the horror games I had on me last year (And talked about them all on the site too...), so I don't have much left. Maybe I'll actually finish Fatal Frame 5 now...

I like to play the old castlevanias during october.

Now that I think about it I will play the resident evil 1 remake

Condemened and F.E.A.R. are the creepiest games i've ever played. I have Isolation, but still haven't got around to playing it. 

OT: I'll probably finally finish Outlast DLC and Resident Evil remaster, as far as horror games go.

That's inFAMOUS: Festival of Blood, a side game about a bullshit story Zeke makes up to hit on a girl at a bar during Halloween. He's tells a story about how Cole became a vampire and had to change back before dawn. The framing device is truly as wonderful as it sounds, and Cole's vampire powers are a drastic departure from the main game. 

Alan Wake! (I know it's a 6 year old game, but I really think it is excellent and scary.)

Also, Limbo (there is an enhanced version for the self punishing owners of current gen PS4/Xbox One - with a super evil and mean dark bonus level!)

Gee, I sure hope that is a friendly spider!

I got Slenderman last year, but so far it's just been frustrating.

Also, the Walking Dead is another good one! 

Kingdom Hearts. That Halloween Town save file.

Bloodborne as well.

As much as I love inFamous, I hate vampires.  So this would be a no go for me.  :)

I dont game on Halloween.

But if I did I'd probably go with Resident Evil 1 remaster. Great thing that Sony made this free for PS Plus this month too.