The single-player mode of Assassin's Creed 4: Black Flag will allow you to connect with your friends' games. Assassin's Creed 4's story will involve other real-life players at specific times. There will also be a companion phone app.
Assassin’s Creed 4: Black Flag will deliver a “brutal pirate experience”, Ubisoft promised with its E3 2013 presentation. The trailer was full of intense naval battles, close combat fighting, and, to quite Ubisoft, "lots of drunken adventures". Check out the trailer below to have your mind blown by Assassin's Creed IV