Call of Duty: Black Ops III Zombies Chronicles Edition includes the full base game and the Zombies Chronicles content expansion.Call of Duty: Black Ops III combines three unique game modes: Campaign, Multiplayer, and Zombies, providing fans with the deepest and most ambitious Call of Duty ever. The Zombies Chronicles content expansion also contains 8 remastered classic Zombies maps from Call of Duty: World at War, Call of Duty®: Black Ops and Call of Duty®: Black Ops II. Complete maps from the original saga in fully remastered HD playable in Call of Duty®: Black Ops III.

Go to https://www.xbox.com Login to your account Hover over your account link (the top right of the screen) a menu will appear, click on the "Redeem Code" button. On the next page, click "Redeem" Enter your code Click "Confirm" Click "Confirm" again to assign the key to your account.