Well, right now, more than anything it's looking like the Amnesia games, Lone Survivor, Stasis, Realms of the Haunting, Noctropolis, System Shock 1, Bloodlines, Resident Evil 4 and Outlast.
I really want to clear those soon.
Just as I thought, hardly played any of them. :-)
I played Outlast, but that is about it. Stasis is on my wishlist for another day, I own the original Amnesia game, Realms of the Hunting, and Noctropolis (thank you again for the lovely gift), but I have not had chance to play them yet. But Outlast was a lot of fun playing with my partner. Sure it has its faults (mainly with pacing at points), but given that it is an indie game, I think it is really good, and has a nice atmosphere.