Hi guys, Im pretty sure this must have been asked a hundred times but i just cant find a full answer to my question. I own a retail copy of Arma2, have done since release. I would now like to buy OA, not just for DayZ but for playng co-op online too. With the Steam sales about it makes sense to buy OA through Steam at a discount. What i dont understand is, do Arma2 and OA work in conjunction with each other? By only having OA do you miss out on things from Arma2? If i have the Steam version of OA im guessing it wont work alongside my retail Arma2. Does this mean that DayZ would also not work? It looks like the easiest option would be to buy Combined Operations from Steam, but its silly to pay for half a game that i already own. Thanks
