From Friday to Saturday, an error started occurring in my game and it stopped working correctly. When I try to open the game, it gives an error with the DLCs, saying it can't find the game's serial number. I've already reinstalled the game, Steam, deleted files, messed with the registry, and nothing worked. Arma 2 and Arma OA work, but the DLCs won't install. The same error appears for all three when trying to install, saying: "Can't find ARMA 2:OA serial number in registry. Please install ARMA 2:0A and te...

How are you going to put your dlc on for sale when it no longer works?

Hello! I remenber in the old days, a replacement mod for the razor team existed. CDF special units for the campaign as characters, somebody still has it? thanks!!

Is there anyone who still plays the game?

I've been seeing posts recently about having this issue with Arma 2 on steam, and I wanted to make a post as after some messing around and tweaking, I was able to come to a fix myself that works. Firstly, this issue stems from an issue with steam writing to the registry, and affects OA in particular which in turn makes it so the expansions also cannot be installed correctly. This will also fix the issue if you're having problems installing the Expansions and ACR DLC. 1. I was able to use Darky's K...