Bryan Dawson (Prima Games): When you first start playing Assassin's Creed 4, you may notice that you don't see a lot of detail on the map of the sea you're traversing. This is because you’ve yet to unlock most of the map so you can view all the finer details. There are 10 Naval forts scattered around the map, divided into easy, intermediate and expert difficulty levels. Sack the fort, and you claim that section of the sea, unlocking all of the goodies it holds. With this in mind, here are some strategies for claiming forts in AC4: Black Flag.