I'd highly recommend Dishonored at least. Very good stealth game in my book. Hell, you could just run around and stab people like a maniac if you so desire. Or just go through the entire game without killing anyone. Game offers a lot of replay value with tons of ways to go about every level and playthrough. All of it taking place in a plague-ridden universe, making it all the better.
I'm interested in the evil within.
http://theevilwithin.com/
The new trailer is awesome.
Dishonored was pretty fun for a bit but..I only played through it once.
Dishonored is a fantastic game! Highly recommended.
Arx Fatalis and Call of Cthulhu are older games that not everyone knows of, but both are awesome and have large followings behind them.
I haven't played some of the newer titles, like Rage, Prey, or Brink.
I'm really looking forward to Evil Within as well.