FPS lovers SAYS Battlefield 4 , will be happy to learn that the new expansion that will come for Premium users in late March and later for all, called Naval Strike will have a fully dynamic environment thanks to the Levolution system of 3 Frostbite graphics engine. For example, you can start the battle with a calm sea which then turn into storm or you can see the sun rising in the distance while fighting rages on our naval resources. The add-on also, will also feature a new medium that will allow us to both use it at sea than on land called ACV hovercraft.