Crusader Kings II achievements

As an Anglo-Saxon or Saxon ruler, be king of both Saxony and England

Become Samrat Chakravartin

As a Zoroastrian, become the prophesied Saoshyant

Fund an immoral bishop and get him elected Pope

Convert Mecca to Hinduism, Buddhism or Jainism

Rule the Empire of Britannia as a Hindu, Buddhist or Jain character

As a Jew, create the Kingdom of Israel

Gain the Legendary Wisdom modifier

As the Anti-Christ/spawn of Satan, become Grandmaster of the Satanists.

Have 6 close family members as friends

Starting in the "High Middle Ages" bookmark as Svend II of Denmark, become the King of England

Have 100 kills in your Kill List.