Possibly the easiest way of seeing how a sci-fi turns into a sci-fi horror (rather than sci-fi action or other subgenre) is by taking a look at the Alien franchise.

Sci-fi horror combines fear and exploration of scientific boundaries. The sub-genre explores humanity's potential and arrogance. Films like Alien and A Quiet Place bring realistic horror to sci-fi.

Echo strikes a fine balance between extravagance and simplicity This underrated sci-fi horror game has the coolest UI design since Dead Space ...