Have you played F.E.A.R.? I'm not sure how the gameplay/difficulty is for F.E.A.R. 3 but Files is like the first one which makes it pretty difficult (Even with the slow-mo.). It's 8/10 because it depends on the person's skill and most people will end up struggling to get certain achievements. To answer your thread question, I have only played COD from Modern Warfare to MW3 and compared to them, Files is harder. And for the achievement question, I searched, and people have said that you can as long as you turn it off immediately or go straight to the Xbox dashboard immediately after dying.
"An empty vessel whose heart has been stolen away... A spirit that goes on even as its body fades from existence---for you see, Nobodies do not truly exist at all."
Last edited by N7 Shadow; 06-12-2012 at 09:06 AM.