The Dawnguard Add-on for The Elder Scrolls V: Skyrim has 10 achievements.
Complete "Lost to the Ages"
Acquire 11 werewolf perks
Acquire 11 vampire perks
Defeat a Legendary Dragon
Use the special power of Auriel's Bow
Complete "Kindred Judgment"
Learn all three words of Soul Tear
Complete "Beyond Death"
Complete "Awakening"
Change your face