Crusader Kings II achievements

Have your dynasty rule 10 independent Feudal/Iqta/Monastic Feudal Kingdoms or Empires with at least 25 realm size each. You must be one of them.

Starting and staying as a Han Chinese character, be an independent King or Emperor and rule all of North Africa (the Maghreb region).

Starting as a Norse character, rule the Kingdom of England (or the Empire of Britannia) as an English cultured character of a Christian religion.

Starting as the last remnant of the White Huns (the Count of Mohadavasaka in 769) restore the borders of the Hephthalite Empire.

Sit on the council and have every other council member as well as the ruler owing you a favor.

Have elephants trample the Pope/Caliph.

Settle a steppe mercenary with more than 20 martial in your lands.

Eat a character of the Bön religion.

Conquer Constantinople as a Turkic steppe horde.

As a steppe horde, have an independent tributary King or Emperor in the British Isles

Have a capital province with Norse culture and Muslim religion

Have a priest you corrupted (as a Satanist) become Pope.