The best horror games from Silent Hill 2 to Alien: Isolation
SOMA has problems, largely from the clumsy stealth section, but it also has, hands down, one of the most unpleasantly disturbing stories of anything in this list.
A first-person trek through a setting literally no one in real life would willingly check out - an old asylum that seems abandoned, but also strangely very active. At night.
Kojima's deeply disturbing demo of the now-canned Silent Hills gets under your skin like no other game. It's just a pity you had to download it to your PS4 back in the day to have access to it now.
Most games can make you jump, they can make you scream, but few can make you doubt yourself in real life. Who'd have thunk painting could ever mess with your head this much?