Koei released the first trailer for Samurai Warriors: State of War for PSP, a game where the action is set in civil war Japan, when great commanders such as Nobunaga Oda, Shingen Takeda, and Kenshin Uesugi battled for control over the country. Compared with the PS2 and Xbox versions of the game, this one comes with a new story and bodyduard system and a wireless multiplayer support for up to four players.