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.
Last edited by N7 Shadow; 06-12-2012 at 09:06 AM.