One Piece: Pirate Warriors 2

One Piece: Pirate Warriors 2 is a One Piece related video game released in Japan for the PlayStation 3 and PlayStation Vita in 2013. The game was announced in Shonen Jump magazine as a sequel to One Piece: Pirate Warriors, with Namco Bandai and Tecmo Koei teaming up once again to publish it along with developer Omega Force, a subsidiary of Tecmo Koei.

Plot Summary
Luffy and the rest of the Straw Hat Pirates find strange purple dials. They release a dark fog which turns most of the Straw Hat Pirates evil. Luffy and Nami, the only ones who were unaffected, flee out. Several of the Marines were also turned evil, forcing Smoker to call a cease-fire and cooperate with the Straw Hat Pirates as they escape the island. Later Blackbeard steals the dials and states that with the "Operation Dial" in his hands, he can now control anyone who was possessed by a "Frenzy Dial". He then activates the Frenzy Dials he had scattered all around Marineford, releasing fog throughout the battlefield that turns every soldier who inhales it evil. He orders everyone present to fight each other to the death indiscriminately.