Update: Outlast 1 and 2 are fantastic games. I haven't played Outlast Trials yet.
SOMA is a wonderful game about existentialism. It's okay if you feel some type of way about the ending
Amnesia TDD was fantastic.
Amnesia: A Machine for Pigs was good too, though less impactful.
Amnesia: Rebirth was fantastic with its multiple endings and reality hopping story
Amnesia: The Bunker only picked up exactly where it ended and could've been better
Alien: Isolation should've been way longer, but fantastic nonetheless.
Layers of Fear was wonderful with multiple endings, even though it could've been a little longer.
The Penumbra series was created by the same people that made Amnesia. I haven't finished them, but I assume they're good.
Scorn would've been better off a movie using the Unreal 5 Engine, and should've pushed UE5 as a movie industry powerhouse.
Iron Lung was a fun indie game full of surprises, but it's not for people who can't use their imagination.
Squirrel Stapler is another fun one. My wife is beautiful and I will have no slander against her.
EDIT: I blindly replied to this thread, and only realized I covered pretty much every game mentioned in this thread after the fact. I don't deserve a pat on the back. Just wanted to acknowledge I pretty much touched on the games worth mentioning since I stopped posting in 2018