If you originally purchased a digital version of the base game, try clearing your system cache ( https://www.bungie.net/en/Help/Article/12539 ) and then restore licenses ( https://www.bungie.net/en/Help/Article/12181 ). Make sure you are signed in with the gamertag that made the original purchase if you have multiple accounts. If you do not see the option to get the base game again, you need to contact Xbox support. They are the retailer for digital purchases, and they manage gamertags and their purchase history. Have them verify your digital purchase of the base game shows under your account, and then ask what you need to download from the games store to license your stuff.