Looking for a game like this..

I'm looking for a game (preferably newer/good graphics) where you play the role of a murderer. I don't mean just killing things like every other game, but something similar to GTA, except more on the killing aspect. Like you can torture your victims or whatnot. And realistic as well, like not a fantasy setting. Are there any games like that?

We've got a Game Recommendation Threadfor questions like this.