Crusaders Kings 2 - The Old Gods Gameplay Trailer

The Old Gods expansion lets the player start two hundred years earlier than the Crusader Kings II base game, at the height of Viking power and when the light of Christianity had yet to penetrate many of the dark forests of the continent, and the power of Islam was still on the rise.
The Old Gods is the fourth full expansion for Crusader Kings II, Paradox's critically acclaimed strategy/RPG of medieval scheming, dynastic fortunes and crusades against the unbeliever.