Platform: PC, Mac, and PS4
Following their success with Amnesia: The Dark Descent, developers Frictional Games released SOMA, a.A disturbing sci-fi horror game set in an underwater facility.
As much as it's a horror game dealing with disturbing alien lifeforms with a similar running and hiding mechanic previously seen in Amnesia, the real impact comes from the psychology and the philosophical questions raised in the game. To go into too much detail will probably spoil game, but I feel it's a definite stand-out game in the horror genre and one that will stay memorable long after you're finished.
The first-person perspective works brilliantly with SOMA's vision of horror. The true horror is found in its psychological and atmospheric surroundings and the perspective here helps the player feel fully immersed in the shoes of the protagonist.