Play Onechanbara Z2: Chaos By the company Marvelous USA Released in 2015 for the PlayStation 4 console. The game revolves around two school sisters, Agura and Saaya, who were raised by a vampire and empirical tribe and are among their strongest fighters. Meanwhile, Aya and Saki are the two killer sisters who returned to the tribe after shedding the blood of their enemies, and now these four girls must unite to fight against the enemies and the army of ghosts. These four strong fighters have taken control of the zombie army and want to use them to save the world. They will succeed in this battle as long as they work together.