Roger_Derby 0 Posted June 24, 2012 Hi, I have the hard copy of ARMA 2 and was wondering can I simply buy OA and play day Z? Or would I need to buy CO? Also would there be any difference between either way of playing the game? Cheers Share this post Link to post Share on other sites
cathysteria@hotmail.co.uk 1 Posted June 24, 2012 CO is simply Arma 2 + Operation Arrowhead, so you could just install OA and it would be the same as if you bought CO. Share this post Link to post Share on other sites
