Activating Witcher 3 DLC on Xbox One is a bit of a process, but it’s not too difficult. First, you’ll need to create an account on the Xbox One platform and then head to the “Games” section. Once there, you’ll need to click on the “Add Game” button and then select “Witcher 3.” After that, you’ll need to provide your console’s name and password. Once that’s done, you’ll be able to select the “Activate this game” option and then confirm your decision. After that, you’ll need to wait for the DLC to be added to your account. Once it is, you can play Witcher 3 without any problems!