Patient Gamers

Subnautica has some creepy overtones.

I'd say Arkane's Prey hits that for me. The feeling of isolation, not only on the station, but by virtue of being in space, and the story itself. The mechanics of the mimic enemies can create emergent jump scares, but I'd definitely say it's not a horror game.

I'd also say Death Stranding, at times. While the human NPCs are very wholesome, the atmosphere and experience of delivering the packages out through the timefallen wasteland and that isolation lends itself well to introspection and the BTs are pretty creepy and axiety-inducing until you're used to them and can fight them.

Half Life/Black Mesa. I replayed it recently and I had forgotten the level of unease that pervades most of it. While short of horror, there's been an obvious disaster, people are panicking, and it's unclear to the PC what is going on for most of the game.

Outer Wilds. It's better to play it without knowing much beforehand. All I'm gonna say is: it will make you feel very lonely and even vulnerable at times, although it's not a horror game by any means. It's a beautiful videogame with a mind-blowing story.

I’d recommend Control by Remedy. It’s got some SCP vibe and has liminal spaces, spooky supernatural shit and great looking environments and game play.

Subnautica is not a horror game, and was not intended to be scary; and yet the way it captures the dark, oppressive nature of deep waters makes it an extremely terrifying experience.

• Bloodborne

• Control (definitely what you're looking for)

• The Last of Us

• Little Nightmares (quite similar to Inside, horror-inspired and creepy but barely any jump scares)

• Inscryption

• Dying Light (admittedly not very scary, but at night where you get chased by creatures can be very intense)

Signal Simulator is a game about being completely alone in a base in the desert doing science stuff in search of aliens. It's not really horror but there's plenty of uneasy stuff in it.

There's also a newer game inspired by it called Voices of the Void which is more actively developed. Technically, it's not horror but the developer likes to fuck with you in all kinds of ways.

I saw a game that fits this bill mentioned on two videos recently. It's called BABBDI and you explore a eery city where everyone you meet can't move other than to twist their heads to look at you. Nothing ever puts you in danger and that's established right away. But everything looks... Off.

S.T.A.L.K.E.R.

it's about scavenging and fighting in a radioactive exclusion zone in Ukraine

it has some monsters, that scare the shit out of me, and 'anomalies' that break the rules of physics

it's really good

Control does a good job of starting out uncomfortable and weird, and continuing to escalate as the story progresses. A great deal of unease since you don't understand what's going on with your character or the environment she finds herself in.

Hollow Knight

I've been playing DREDGE and it definitely has the creepy element down. It's gotten me hooked for sure

I'm surprised I haven't seen Morrowind in the comments yet. The storytelling gave me the impression that Todd Howard must've played a lot of DND campaigns while under the influence of psychedelics just to lay the setting for the plot. I highly recommend because I've had a lot of moments throughout my playthrough asking myself "wait, did that actually happen?" And, "Is this a Bethesda bug, or is the game straight up cursed?". Also, Many of the characters, creatures, and a certain "house", or faction in the game are straight up Lovecraftian, with aesthetics pretty on par with Bekzinski's art-style. I also think the Marathon series fits the bill on a lot of these aspects. It's Bungie's precursor to Halo, and while its narrative may be similar, I think the devs had to get creative with the limited software capabilities available at the time and so the narrative ended up being an experience I'd describe as "wild and uncanny".

The world of Scorn felt pretty alien and unnerving.

Bendy and the ink machine

Check out Manlybadasshero's channel, he plays a lot of games like that. CJU does as well. A lot of them are very narrative-based, which might not be what you're looking for. The Coffin of Andy and Leyley for example, freaking fantastic game but it's a slow creepy burn rather than action-oriented. Little Misfortune is another personal favorite, and the Tartarus Key. They also play some random ass games like this https://www.youtube.com/watch?v=2VWL4vKRp8U where it's a dystopian world and you never really find out what's going on, which sounds similar to what you're into.