Recommended for stealth gamers everywhere. Two up!
One of these features is the incredibly open-ended gameplay. Let's say you encounter a sentry standing guard in front of a doorway. You could do many things to fix this problem. You could A) knock him out with chloroform, B) give his lung an extra airway with your knife, C) steal an officer's uniform and just walk past, D) find another way in, and E) shoot his freakin face to the moon. This really gives you a respect for the grizzly creativity that these spies had.
Another thing that I really enjoyed about this game is the fact that it is more a simulation than a run-and-gunner. It has a huge emphasis on realism, and I love it when games are more realistic than not. (Though that is a matter of opinion, and some people may not like this.)
I've traveled many roads in my stealth gaming career, and this game holds its own against all the others. If you like games of this genre, I recommend it.