The Charlemagne expansion for Crusader Kings II is now available worldwide for Windows, OS X, and Linux, offering additional content for Paradox Interactive's strategy sequel. This brief trailer celebrates the news, and word is the base game is currently on sale through most digital outlets. Here's the pitch:

As usual, the expansion will be accompanied by a host of free changes to the core Crusader Kings II experience, available in a major update that can be downloaded today. This free content includes a major overhaul to the nomadic tribes of Europe – now they are even more distinct from their neighbors hiding behind castle walls.

"Charlemagne" will introduce Crusader Kings II players to the man who became the “Father of Europe,” uniting much of the continent for the first time since the since the fall of Rome and founding the Holy Roman Empire. Including the ability to start a dynasty as far back as 769 AD, the expansion will include a series of story events surrounding the rise of Charlemagne. The expansion also features game options to allow players to chart their own places in history – such as a new in-game “Chronicle” that highlights a dynasty’s conquests, marriages, and labors for the faith.