TheBIGLebowski 1 Posted August 2, 2012 I purchased Arma CO last night on Steam. I have downloaded and installed both, I can start and play all games except when I launch Operation Arrowhead and select CO at the bottom. After I click it, there is like a small DOS screen that pops up for a sec then goes away. Then nothing happens, the little check boxes dont come up like on the other games. Ive tried downloading the new update, reading on every forum. I cant seem to find someone else with the same problem in a thread. If you would please guide me to what is wrong it is greatly appreciated. I want to get down on some DayZ mod, and also enjoy what Arma offers that other shooters lack. Share this post Link to post Share on other sites
Nutlink 10 Posted August 2, 2012 Did you try running ArmA 2 and Operation Arrowhead separately before trying to run CO? Share this post Link to post Share on other sites
