Personally, in my youth I played a lot of hl and never had the feeling of fear, the same applies to fashion games and mods, the only thing that interested me in the game of valve was the fact that the zombies in hl2 speak humanly but it is reversed speech, but when it comes to o all games, I had a strange feeling when I uploaded the gta are sound from the archive x while being close to zombie cars, the same moving vehicles with such a melody in the background improved the atmosphere
So to sum up, silence or a delicate melody can scare you, but in hl I have never had the feeling of fear