Sanitarium
filfre.net
filfre.net
We regularly talk about it on /r/adventuregames!
I also highly recommend I Have No Mouth and I Must Scream. Similarly psychological horror, excellent writing. Brilliantly voiced by its author.
Both among a small handful of games that have made me cry.
I'll be curious to see if anyone else explores the thought cabinet or the skills as mind stuff again because it seems ripe for further experimentation. There's still a chance the former ZA/UM devs do, but having to start over makes that harder.
Just play it with a walkthrough. You can get yourself blocked iirc. Otherwise yes, I would recommend too.
I'll have to add this to my backlog.
Next up, harvester.
[Clickety click] Oh, it's on GoG and I already have it there. Good.
The isometric viewpoint never really worked for me, and undercuts the immediacy of the horror. Things aren't happening to you, but to a little human figure the size of a game piece. Maybe this is a hot take but horror games generally need to be first person.