Here is the full list of all 30 Vlad the Impaler achievements.
Defeat Vlad as the Sorceror
Get all the achievements
Kill Vlad with the The Bloodspark
Get all of the weapons for the Mage
Defeat Vlad as the Priest
Kill Vlad with the White-Out
Kill Vlad with the Dagger of Perpetual Stone
Get all of the weapons for the Soldier
Kill Vlad with the Two handed Axe of the Oaken-Heart
Kill Vlad with the Pole-Arm of Menace
Get all of the weapons for the Explorer
Defeat Vlad as the Spy
Kill Vlad with the Primal Dirk
Have a skeleton give you a prophecy
Defeat Vlad as the Knight
Taunt Vlad
Die to Vlad
Kill Vlad's Wife
Defeat Vlad as the Assassin
Reach maximum evil morality
Recieve a mysterious silver stake
Get the arm of the King of the Catacombs
Put the Red Harem out of their misery
Learn how traitors are treated in Istanbul
Complete a quest in under 10 seconds
Defeat Vlad as the Emissary
Convince Vlad to stop
Enchant your weapon
Get to Vlad's Castle
Reach maximum good morality