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# oXid3 :
Hi, i bought both, ArmA2 and ArmA2 OA as combined ops via STEAM, installed both, how do i shoud to install the addons ?
Check this topic:
I can not be of much help with Steam. I dont use it and I would like to keep it that way
How do i know if its running as combined ops ?
Start the game, go to options, go to expansions and you should see Operation Arrowhead listed and active.
Also the main menu screen should show the Desert map which comes with OA and you should be able to play the Arma 2 campaigns.