I recently found a game that is really creepy and intense. You really have to use your head (and sometimes the video w/t). The format is the one where you feel as if you are actually there. Am not that fond of this type of format, but once you get used to it, it's better.
The game is called Dead Secret. I am thoroughly enjoying this game. But, as I said, you have to like somewhat creepy games to enjoy this. It has a very good story line and is also a detective type game.
Check it out. I got it on Steam.