This thread was COMPLETELY out of date, so I decided to start over fresh with it. This is yer average catch-all for all horror related games for 2015 and beyond!
Most recent releases of note:
ZombiU - Arrived on Steam and next gen consoles, minus the multiplayer functionality but otherwise the same great survival horror game with light rogue-like elements.
Until Dawn - PS4 release. Choose your own slasher flick!
SOMA (22nd September) - Sooon now....so very sooooon....
Perception - Still a kickstarter at the time of writing, but I have my fingers crossed for it.
Fatal Frame 5 - IDEAL for the WiiU's controller.
Untitled Nippon Ichi title (thanks Mantid) - not sure what this is about, aside from being some sort of first person asthmatic dalek simulator.