Fueled by next-gen technology, Mortal Kombat X combines unparalleled, cinematic presentation with all new gameplay to deliver the most brutal Kombat experience ever. For the first time ever, Mortal Kombat X gives players the ability to choose from multiple variations of each character impacting both strategy and fighting style. And with a new fully-connected gameplay experience, players are launched into a persistent online contest where every fight matters in a global battle for supremacy.

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.