Paradox reveals plans for new expansions for both Crusader Kings II and Europa Universalis IV, maximizing efficiency by announcing both add-ons simultaneously. Crusader Kings II will expand with the release of Charlemagne, while Europa Universalis IV will be updated with Art of War, and the expansions will come to Windows, Linux, and OS X, though no release dates are specified at this time other than "the near future." Here's a Crusader Kings II: Charlemagne announcement trailer and here's a Europa Universalis IV: Art of War announcement trailer with looks at each, and here's word:

Paradox Interactive today revealed two new game expansions for their award-winning grand strategy titles Europa Universalis IV and Crusader Kings II. The expansions, entitled “Art of War” and “Charlemagne,” coming respectively to Europa Universalis IV and Crusader Kings II, will add new events, new mechanics, new in-game abilities, and plenty of new ways to change the course of history for strategy fans everywhere. Both expansions will be available for their respective games on Windows, Mac, and Linux PCs in the near future.

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. Now starting in 769 AD – another century to play! – the expansion will include a series of story events that follows his rise to power, and will come with new 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. Kingdoms are also more customizable in Charlemagne with the option to create your own with custom names and banners.