Umm, well to be honest I don't really know the differences, It seems the standalone will be using a more advanced engine? So i'm guessing that that will have an impact? I read you would need combined Operations to be able to play the regular DayZ mod is that correct? Or is there something else I will be needing in order to download and play the DayZ mod. As of right now I'm downloading the operation Arrowhead demo, so I'm guessing when I start that up it will be pretty much the same graphics as the DayZ mod will be, so if I can't run OA then I won't be able to run DayZ