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