Have you played in new Assassin's Creed? I have and I must say it's the best assassins creed game so far. You became pirate and you are fighting with other pirates. In game you have 60% fights on land and 40% on sea !! It's really a lot!. Here you have link to my youtube video that prooves that crack is working and here u have link to download !.
Put the crack into Assassin's creed black flag folder !!!!