Compared with those in the robot game, so players are manipulating the body to start their own type of fighting is, "Carnage Heart" series is an opportunity for players to design is called "OKE" (Over Kill Engine) military robot hardware and software equipped with the body to perform procedures, including action to combat a variety of settings, etc., in order to design the "battle thinking" to make the body of a robot battle simulation strategy combat game, since 1995, in PS host after the launch of series of the first works, has been praised by the players love. This time published this, the PSP handheld is released before the former as a basis for adding a new story, new OKE additional series of different models with the latest for.