The year is 1715. Pirates rule the Caribbean and have established their own lawless Republic where corruption, greediness and cruelty are commonplace.
Among these outlaws is a brash young captain named Edward Kenway. His fight for glory has earned him the respect of legends like Blackbeard, but also drawn him into the ancient war between Assassins and Templars, a war that may destroy everything the pirates have built.
It is a good game. But for me it's too much. I wish I could complete the game 100% but there is just too much ground to cover. AND that you have to go under water which was a pain. A really nice and fun game, but could have been a bit smaller.
If the size of the game bothers you, don't even try Obilvion or Skyrim.. Those games are huge!
I don't own the game (yet), but I've watched my friend play, and it looks amazing.
I love Assassins Creed as is, but add owning your own pirate crew and ship vs ship battling.. I'm a happy man!