>>715907352
Starsector does it pretty well. It's not jumpscare horror, but there is a definite horror to running out of fuel in the middle of space. There's also sensor anomalies that make it look like you're being followed by unknown fleets when nothing's really there... unless *something* is
And of course there's times you hear a distress call when passing a system, and it could be people who need your help, or it could be pirates, or something worse...
Abyssal Hyperspace and the things in it are legitimately horrifying, and the Notes are some prime psychological horror

I honestly think Starsector has some great horror. It does the unknowable aliens trope really well, even when it's not aliens or when it is...