The Dawnguard Add-on for The Elder Scrolls V: Skyrim has 10 achievements.
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"
Acquire 11 vampire perks
Complete "Awakening"
Complete "Lost to the Ages"
Acquire 11 werewolf perks
Change your face