Hi everyone and thanks for reading. I have recently bought Arma 2 Combined Operations from Amazon. Operation Arrowhead downloaded perfectly but after many attempts i couldnt get Arma 2 to download. So now i have Operation Arrowhead installed but i don't have Arma 2. I have been told that Steam is a lot better than Amazon for downloading games so can I buy just Arma 2 from them and combine it with Operation Arrowhead from Amazon and still play DayZ ? The reason i think the download failed from Amazon is because of my super slow internet so do you know if the download woudl be different ? Thanks everyone and please reply ASAP :D