Assassin's Creed IV: Black Flag is the sixth major installment in the series. While it introduces a new historical protagonist, its modern-day story continues the overarching plot, particularly the arc that started in Assassin's Creed III. Most of the familiar elements from the previous installments return, including free-form movement, the possibility to climb on buildings, a mission-based system with main and secondary quests, weapon management, collecting, etc. Besides a few tweaks, combat system largely remains unchanged as well