This story takes the unfinished Wano arc and makes the story something new. It also features four new multiplayer modes called Giant Boss Battle, Total Bounty Battle, Timed Defense Battle, and Territory Battle. The game has its own original story that takes the Wano arc from One Piece and changes it. A new game mode called 'Titan mode' is introduced, where opponents are actually their size like being really small or being a giant from the anime, forcing the player to adjust their strategy.
The game features game play similar to the previous installments. It is a sequel to the 2015 game One Piece: Pirate Warriors 3. It is the fourth installment in Pirate Warriors video-game series, based on the One Piece franchise. Game Review One Piece: Pirate Warriors 4a is an action-adventure video game developed by Omega Force (Koei Tecmo) and published by Bandai Namco Entertainment for Microsoft Windows, PlayStation 4, Xbox One, Nintendo Switch.