How about A Weekend Trek up The Dead Mountain?
Let me tell you a story. Around this time of year, back in 1959, nine experienced skiers set out to trek up across the northern Ural mountains. However, none of them ever came back alive. When rescuers eventually came across their final resting place along the mountainside of the Kholat Syakhl - indigenous Mansi for "Dead Mountain" - their bodies were found scattered, frozen solid during a violent blizzard.
Because of the mysterious circumstances surrounding the incident, many theories have arisen since. Their tent had been torn open from the inside, and most of the skiers had apparently gone out without even putting their boots on. Some of the victims had fatal injuries not caused by hypothermia or gangrene. Some of the clothing found showed high amounts of radioactivity. Another group of hikers some 50 kilometres away had purportedly seen "strange orange spheres" in the night sky, in the direction of Kholat Syakhl.
Now, if you don't think this setting is a pretty damn good starting point for a horror game, then I don't know what is. And I'm apparently not alone. Polish developer IMGN.PRO is actually in the process of making a first person horror game in the Unity engine, based on the events that took place at the Dead Mountain on that tragic night. They've started a Greenlight campaign which I suggest you click your way into, and then proceed to click on every share/follow/favorite button you can find.
We've embedded a teaser trailer for you above as well, though don't expect too much gameplay. But then again, this is the sort of game where you don't want too much shown off before you actually play it yourself anyway.