I have a boxed copy of ArmA II, I somehow picked this up on clearance or something about a year ago or it was given to me. I honestly cant remember why I have it. I opened it and thought about playing it, but never did. I need to find the actual disc for it thought. Anyways, from what I've read I now need to get Operation Arrowhead.
So how do I go about this? Can I buy OA via download from somewhere like http://www.gamesrocket.com/download/Arma-II-Operation-Arrowhead.html
If I didn't have ArmA II I might have gotten Combined on steam, but if I can just bu OA for $12 that would save a lot of money. Although this plan is contingent on me finding the disc for ArmA II first, unless there is a way to register my key and download it.
This is the best guide I could find so far http://dayzmod.com/forum/showthread.php?tid=2085
But I still cant tell if it will work if I buy the gamesrocket digital version. Will it work like the steam version?