Extremely sorry if there is already a topic but I couldn't find the information anywhere. I have operation arrowhead, I bought it as a retail copy, but I don't have arma 2 and I was going to buy it on steam. Someone said that to play this mod you have to have both of them on steam so that they both run at the same time, this pissed me off a bit as buying combined operations (though its cheap on steam) seems a tad pointless when I already have one of the games! I know that I can have OA as a non steam game but after i've set it as this, after turning my computer off a few times it no longer shows up in my steam library and I have to re-add it so surly its not actually being run by steam? Some of my friends play and I have played the game at theirs so my predicament is really annoying me. Apologies again if I have put this in the wrong place I just couldn't see anywhere else to put it but here!
