Hah, good luck. Sorry, just the cold hard truth. Dead Effect is your best bet. Also, do you happen to own a gaming console?
Yeah sadly not a lot of samey titles... But you can check these out: Bioshock (FPS, but has a lot more in common) Dead Effect (this one is fps too, but could be a good replacement) Mass Effect Infiltrator (of course this is an ME title so it isnt scary, but the gameplay is similar) Shadow Gun (no scares, but samey gameplay) Oddworld Stranger's Wrath (also not of the scare-genre, but the shooter+adventure gameplay might scratch the itch. plus, this is a classic if you havent played this one before)