These videos speak for themselves 
Warning, strong language, gore, watch if +21 only (and not easily offended).
COD6 Trailer - http://www.youtube.com/watch?v=u6CJBVl6Ogw
CODX Trailer, with X being for any version after 4 - http://www.youtube.com/watch?v=Ly3OTtXdJEg
COD Player - http://www.youtube.com/watch?v=jx6nYP_eDDg
And a bonus, DayZ/Left4Dead! - http://www.youtube.com/watch?v=qa3XCEBwX-k
Why did I post this? I don't know, guess it can be fun to watch for some, hope nobody gets offended though 
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Speed, Precision, Experience, Endurance. General System Tweak Guide
