you could try "Cry of Fear", its a half life 1 mod, pyrocynical did like a 3 hour video on it but that ofc will spoil the plot and stuff
"MY NAME IS NOT IAN BRANDON SOMETHING!!!"
i have played a ton of horror games in my day but nothing has come close to scaring me. any recommendations? i prefer 80s horror. stuff like halloween, scream, and recently hellraiser.