My bro got this game for me as a present and I had never heard of it. At first I wasn't crazy about it because I'm not big on 1st person shooters, I tend to get killed really quickly (that, and the motion sickness).
But, this was the first where you could take your time and had to hide and be quiet to get where you wanted to be. You can pick pockets, hide in the shadows, silence your footsteps on soft surfaces, and if I were you, I wouldn't try jumping out to take on a guard.
You can shoot from a distance, but you'd better make sure it's a head shot and kills them, or they're coming after you, and they've got friends...
A good game, nice atmosphere, good puzzles, and gets pretty challenging as the game goes on, making you think through your strategies.
8/10