Samurai Warriors 4

Samurai Warriors 4 features a character-switching feature, similar to the spin-off, Samurai Warriors: Chronicles, with which players can take two characters into battles simultaneously, and freely switch between the two. Like previous games in the series, the setting and story of Samurai Warriors 4 is centered on the Sengoku period of Japan, a period of much military conflict and political warfare. (wikipedia.org)