its smarter to use a knife when you have to opportunity, because when you shoot someone, you might alarm the guy around the corner, and if you knife your target, you can hold him back so he doesnt fall forward. its quite logical if y understand it
best...thing thing arena...yet...atleast to my opinion... its not die hard xtreme on hardcore, but its not like "oo guy, hmmm, lets see, what shal i kill him with this time..."