Doom wasnt scary. It was just startling when you open a door and this huge fucker lunges at you. Or one teleports right behind you and attacks you all of a sudden. I don't see how this game can possibly be different.
Sov's guide to a good FPS horror game: (select one option)
(zombies/Ghouls/mutated humans) take over a (secret military base/ secrete illegal corporate underground lab/some genetics lab ), and only you, (the last remaining solder in the complex/ a member of an elite team/ a random guy whos in the wrong place at the wrong time) can stop them!