Note: CD-Key / Code Delivered digitally to your email account with instruction.
Digital download of the game is provided through Steam

Dawnguard™ is the first official game add-on for The Elder Scrolls V: Skyrim® - the 2011 Game of the Year. The Vampire Lord Harkon has returned to power. By using the Elder Scrolls, he seeks to do the unthinkable - to end the sun itself. Will you join the ancient order of the Dawnguard and stop him? Or will you become a Vampire Lord yourself? Featuring an all new faction questline and locations, the ultimate choice will be yours.

Features:

• New Weapons , Armor , Spells and Shouts - Join the Dawnguard and wield all new crossbows and craft your own arrows, bolts, and Dragonbone weapons. Use new weapons, armor, spells and shouts, including the Soul Tear shout - that rips the souls from your enemies and  turns them into your minions.
• Become a Vampire Lord - Side with the vampires and become a Vampire Lord yourself. Hover across the ground, turn yourself into bats, levitate your enemies as you drain their life, and more. The Vampire Lord features its own upgradable perk system.
• Werewolf Perks added - Playing as a werewolf now has its own upgradable perk system including Bestial Strength, Animal Vigor, and Savage Feeding..
• New Locations and Creatures - Choose from two new fortresses to upgrade and call home, Castle Volkihar or Fort Dawnguard. Discover lost valleys and travel to a new realm of Oblivion, the Soul Cairn. Battle new creatures including Death Hounds, Gargoyles,  Armored Trolls, and all new vampires and dragons.
• Change Your Appearance - Visit Riften's Ratway and find the woman who can change your appearance, altering your face or hair