The Dwarven Kingdom level in Arx was the most powerfull horror and tension experience in my computer gaming life. Did you play it without sound too?
Cant complain this is'nt a thing nowadays. I broke my mouse playing TES Arena this way. By the way, check out Trespasser (1998) in this regard.
Overall, thank you for sharing your impressions in such elaborate and intresting way. It was really an engaging read.