Horror games you recomend
The Forest. I mean, you have to be into survival/crafting games, but The Forest was the first game in ages where I legitimately felt creeped out and jumpy. Tons of great atmosphere.
Mine is a quite old title but I remember phantasmagoria was one of the best ones I played
Games like Amnesia and Outlast will feature highly in any recommendations, but I find them to be boring walking funnels. Instead I'd recommend something like Dead Space which is much more fun an experience.
Penumbra series(created by devs of Amnesia, the very first series)
SOMA... maybe it's more creepy than truly scary (still it is described as a sci-fi horror game), but the story was just so good. And it's from the same studio that gave us Amnesia: The Dark Descent. (and Rebirth, which is apparently not that great)
I'm a total wimp in horror games so Alien: Isolation was a terrifying experience for me.
Condemned: Criminal Origins
Silent Hill Homecoming
You can find on steam really cheap and it has really cool atmosphere.