Tomb Raider: Underworld represents a new advancement in exploration-based gameplay. As fearless adventurer Lara Croft explore exotic locations around the world, each designed with an incredible attention to detail resulting in breathtaking high-definition visual fidelity that creates a truly believable world and delivers a new level of challenge and choice. Features Master your surroundings: Reach new heights with the broadest range of acrobatic abilities and utilize objects within the environment to uncover new paths to explore. Explore epic and unknown worlds: Discover ancient mysteries of the underworld hidden within the coast of Thailand, frozen islands of the Arctic Sea, the jungles of Mexico, and more. Treacherous and unpredictable challenges: Each level is an elaborate multi-stage puzzle masked within an interactive environmental playground offering more flexibility over how the area is solved. New range of combat options: Choose to pacify or kill, target multiple enemies at once with the new dual-target system, and shoot with one hand while suspended with the other. New state-of-the-art gear: Utilize the latest technology in Lara's upgraded inventory to navigate the world including:- Active Sonar map: A revolutionary new tool that emits an active sonar ping to create a 3D image of Lara's surroundings, perfect for uncovering hidden items and locations.- Multi-purpose grapple: A claw-like device with a high-tension cable designed for climbing, rappelling, performing wall runs and manipulating objects within the environment.- All-terrain hybrid motorbike: A unique vehicle design built to drive on everything from mud to snow and ice.

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.