I don’t know how spooky youre looking for, but Obscure and Obscure II: The Aftermath are classic co-op Survival Horror gameg. Well, theyre not that scary, really. Sometimes it makes you laugh because of how ridiculous it is. But still, the game was fun and when I played the game with my brother, I went in with zero expectations and walked away fairly impressed.

Abiotic Factor can be a bit spooky at times in the same way the game that inspired it, Half-Life, was sometimes spooky.

Both Resident Evil Outbreak games on PS2 are playable on emulator but they have a pretty involved setup process. If you have the technical capability to follow the instructions, that could be fun. Of course, with RE, there is also Resident Evil 5 and Resident Evil 6, which aren’t really call that scary since theyre more action focused, but they are cooperative capable.

Sons of the Forest is also pretty good if you are looking for a more open world survival atyle game. Also has quite a few spooky moments and enemies.

In that same idea, Project Zomboid is like a zombie apocalypse Diablo. But with more survival based mechanics. The game isnt that scary once you figure stuff out, but the risk is always there that your character could permanently die at any moment.