Huh, Metro 2033 is scary? In what way?
FEAR is slightly better, but it gets old fast (the scare factor I mean) when the novelty wears out, but, it still is a good game.
AvP does a nice job in some areas, but, it is more of the same, you can't see the enemy, until you are in its face, or, it pops out of the darkness.
Having no spiders is no fun! Get a few plastic ones, and then go play whatever game, and when the time is right, lower a spider that was tied by some fishing line at her. I am sure she will get scared proper!
Sure, you might have to sleep on the couch after that, but... then, you just wait for her to get into bed, where you had a live tarantula there, and when she screams, you can run in and "save" her. Then you will be rewarded for your act of bravery.
See, you win at the end!
If for some odd reason you don't want to go for a sure thing, then, well, wuss out and play your metro 2033 (though, I still don't know why that game would be considered scary).