Depends if you want trippy, weeb stuff, gritty, psychological, there's some good stuff out there. Ib, yume nikki, scp containment breach, look up the /v/ wiki recommended games for horror list. Idk if they still update it or if it's even still a thing but it was a decent list a few years ago.

If you can emulate ps2 games you will be more than set with that as well.. fatal frame 2, rule of rose, haunting ground and literally dozens more.

The joy of creation

>>17805836
M8 you're on the internet. You have access to every game ever released which doesn't use denuvo. You're going to need to be more specific.

That said, FEAR1 and silent hill 1 -3 are generally considered the best mainstream scary games

>>17805836
>free to play
Goliath the Soothsayer, if you like short mysteries.
A Dark Room, if you have some imagination.
Rebuild, if zombies are your thing.

Any scary game is free Thepiratebay.se

>>17805836

worlds.com

Exmortis 1 and 2 on newgrounds

>>17806862
Those games are great
Shame the 3rd one sold out