MrCoffe I dont know how you didnt find SS2 scarrier then all those other ones. Did you actually listen to all the gamelogs, and get involved in the story? Those other ones you listed I didnt really find very scary, doom and fear were just pop out and scare type things. Whereas SS2 had a more psychological approach, you learn more and more about the psychotic things that have happened on the ship. Also there was always a feeling of presense in SS2, as if you were always being watched.
They also put creepy parts in the best possible time, like when you are walking down a corridor you hear the chatter of the many, talking about something creepy.
Even using your inventory was scarry as **** since at any time a monster might find you and attack you while you are trying to repair your items or add stats.
I tried undying but couldnt get into it for some reason, probably because I hate reading anything longer then a page of info in a game. I dont like it when people put books in games, its dumb IMO. Also the monsters were obscenly stupid in that game, getting stuck all the time and being super easy to kill.
Part of what makes SS2 so scary is the fact that you are extremly limited on resources. The whole game I went through with a melee weapon pretty much since you are so limited on ammo, and guns break so easily.