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I want to play the original 3 campaigns from Blitzkrieg 1. But all I can choose from, are the campaigns from the 3 addons and single missions. For example, the soviet campaign isnt available. It seemd, the Original Blitzkrieg is missing. How can I play the missing 3 campaigns? The game directory seems to miss Blitzkrieg 1 Files. I only can find, RT and BH. :(

Thanks for your help!
Problem solved!

It was "hiding" in my list.