>Slender
Seminal classic, if very basic and extremely Seinfeld'd.
>Ao Oni
Silly, tense, unpredictable, and good puzzles... except the piano one, fuck you lol.
>FNaF 1-6 + UCN
Really great atmosphere, sound design, cool character designs (99% at least), and it was fun to follow along the story as it was happening, even if it was too phoned in.
>Baldi
Great shitpost game. Absolutely nails the 90s edutainment aesthetic, while also being both funny and tense at times.

These are the only good/cool "fad" horror games off the top of my head. Remind me of other actual good ones.
>>713133389
I mean... yeah, but that's kinda apples and oranges.
I assume you mean Overture?