While the game was confirmed to be in development for the PlayStation 3 as early as 2012, it was not until the SCEJA Press Conference in September 2013 that the game was officially announced, with a version for PlayStation Vita in addition to PlayStation 3, and was released on March 20, 2014, in Japan. The game was made to celebrate the tenth anniversary of the series. Unlike past Samurai Warriors games, this one only has Japanese voice overs. Samurai Warriors 4, known in Japan as Sengoku Musou 4 ( 戦国無双 4), is a hack and slash game by Koei Tecmo, and sequel to Samurai Warriors 3.