One Piece: Pirate Warriors 4[a] is an action-adventure video game developed by Omega Force (Koei Tecmo) and published by Bandai Namco Entertainment for Microsoft Windows, PlayStation 4,[2] Xbox One, Nintendo Switch. It is the fourth installment in Pirate Warriors video-game series, based on the One Piece franchise. It is a sequel to the 2015 game One Piece: Pirate Warriors 3. It is scheduled for release on March 26, 2020 in Japan and ..