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I bought the "buy series" as a bundle from yesterday's sale on Field of Glory 2 - but then noticed that wolves at the gate dlc was not installed. I double checked and for some reason the "buy series" did not include that particular dlc.
I bought it separate afterwards. This was my own fault for not double checking what was included in the dlc, and for assuming buy series meant the "complete series"

But for the next person, just suggest they do not assume the same as i did.