Way of the Samurai 3's North American release was handled in an unorthodox manner, with Agetec publishing on PS3 and UFO Interactive publishing on Xbox 360. That may not be an issue with the newly-announced fourth entry in Acquire's free-roaming samurai action series, because it's been revealed as a PS3 exclusive. Of course, the Xbox 360 port followed the PS3 version in Japan by four months, so Xbox players may still see the way.
According to Siliconera, the exclusivity was announced in a Famitsu article, which also offered some details about gameplay. You'll be able to choose your samurai's age, and then, through actions, choose to align them with one of three feuding groups. You'll also have more available actions within event scenes. Of course, during the gameplay scenes you'll always have the "slash" action.