Prepare yourself for a lot of piratey talk to invade Co-Optimus as Assassin's Creed IV: Black Flag is officially getting a co-op mode. So, "arrr!", "AVAST!", "yo ho ho and a bottle of finely purified water because seriously the stuff they drank in those days had to be mixed with rum to kill what was in it." Alright, with all of that out of my system, let's talk some details.