Assassin's Creed IV: Black Flag is a 2013 action-adventure video game developed by Ubisoft Montreal and published by Ubisoft. It is the sixth major installment in the Assassin's Creed series. Its historical timeframe precedes that of Assassin's Creed III (2012), though its modern-day sequences succeed III's own. Black Flag was first released on the PlayStation 3, Xbox 360, and Nintendo Wii U in October 2013 and a month later on the PlayStation 4, Microsoft Windows, and Xbox One.