Sounds up my alley, it sounds like Amnesia or Penumbra. I forget which one prevents you from killing anything. I like the horror games where you have to run to survive or where you have something follow you but you can't kill it until the end or at all. I think Fatal Frame is the same but it has been ages since I have played it. I am quite the big aliens fan yet my knowledge on it has become fuzzy. Alien and it sequels has some remember-able lines in it, I would not mind hearing them in the game. I have to keep my eye out for it when it comes out.