Assassin's Creed 4: Black Flag

It is the sixth major installment in the Assassin's Creed series, a sequel to 2012's Assassin's Creed III's modern story and a prequel to its historical storyline. The story is set in the early 18th century Caribbean during the Golden Age of Piracy, and follows notorious pirate Edward Kenway, grandfather of Assassin's Creed III protagonist Ratonhnhaké:ton, who stumbles upon the conflict waged by the Assassins and Templars. Unlike previous games, gameplay elements focus more on ship-based exploration in the open world map, while also retaining the series' third-person land-based exploration, melee combat, and stealth system. Multiplayer also returns, albeit with only land-based modes and settings. (wikipedia)