>>3 Most people find new games through reference and suggestion.
Anyway, since
>>1 is looking for a PC horror game - I'd suggest Nightmare House, and its sequel Nightmare House 2. They're both very good games, with fascinating story lines to them and a fair amount of psychological horror.
I really appreciate them in particular because a lot of the scary parts of the game aren't thrown in your face. There are a couple cat scares, but the truly horrifying things require attention to detail, and work on a mental level. It aims primarily to creep you out, and then build a rising tension that builds into horror - As opposed to suddenly scaring you out of nowhere for a brief moment.
That atmosphere in particular makes the cat scares that
are in it so much more satisfying.