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It seems to be hidden on your main profile (https://www.exophase.com/xbox/user/Nasenhaarzupfer/). It should be hidden on your Xbox profile as well *if* you are logged in. Otherwise it is not hidden. The reason being is that there is no verification on adding an Xbox account here, so if we allowed that the issue is anyone could hide someone else's games. Maybe if we add a way of verifying Xbox accounts in the future then this will be allowed.