The Crusader Kings II E3 trailer offers a look at Paradox Interactive's upcoming strategy/RPG sequel. The clip is all gameplay, which in a game of this sort, shows off a lot of the interface. Here's a summary of the game, which is due early next year: "Starting in the year 1066 and encompassing 400 years of European history, Crusader Kings II explores one of the defining periods of world history in an experience crafted by the masters of Grand Strategy. Take on the role of a Christian nobleman in the age of the Crusades as Medieval Europe is brought to life in this epic game rife with strategic and tactical depth." Here's the embedded version.