Europe is in turmoil. The lands are fragmented into petty fiefs, the emperor struggles with the Pope, and the Holy Father declares that all those who go to liberate the Holy Land will be freed of their sins. Now is the time for greatness.
I have played this game for hundreds of hours. It is by far the best Paradox grand strategy game. It has a perfect blend of RPG elements and strategic elements. Also, the mod community is fantastic and usually has the type of thing you're looking for.