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Yeah, so I bought MnB and WB off GOG. Adding them to my profile's "Owned games" only worked for WB (and VC for some reason, though I never bought it), but Classic doesn't have a serial key tab on GOG, so I can't add it on here. I know it's silly, but how do I actually add it? I searched the internet and someone said that you have to buy the game off the TW website to have a 'visible' serial key, but since I already bought it off GOG, why would I buy it again from the TW website?