A new trailer from Assassin's Creed IV: Black Flag offers "Assassin's Creed 4 101," a nine-minute primer on the upcoming stealth sequel. Here's word: "In this preview of Assassin’s Creed IV Black Flag, learn everything there is to know about the largest and most immersive Assassin’s game ever created. See how Edward Kenway takes on the Golden Age of Pirates, and meet the outlaw characters that defined this unforgettable era. Experience the breadth of this open-world, including enhanced naval gameplay, expansive new environments, exotic animals and the vibrant underwater world. And learn more about new combat features and weapons, including dual-sword attacks, multi-gun abilities and the free-aim system."