If you are not a perfectionist, you shouldn't be playing Hitman.
Which pisses me off about the demo, because you can't beat it without killing no less than 12 people and still remain undetected. Note that the tutorial has you off around 17, but I found ways around killing a lot of people by using the coin, etc. rather than what the tutorial states. However, the snipers, two guys in the room, elevator guy, etc. you have to kill, no way around it. Hopefully its not reflective of the game, because all previous games you could make it all the way thru levels without killing anyone but the target with a few exceptions (there were sometimes one guy that you had to kill to get through, but rarely more than 1 and often just two if that).
In any case, I'm just pissed that the highest I can get is Eraser in the headlines for the demo