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