The Ninjas have powered up. Use the back touch pad to activate their attacks. The new controls on the PS Vita adds a dimension to the gameplay, allowing novice and veteran ninjas to execute their sure kill skills with one swipe. If you already know the special skills of Ryu and Ayane, Rachel or Momiji, you'll have an extra edge over your enemies. Switch player characters in mid action so the one who's a best fit for the battle can take care of things for you. And by using the touch screen functions, the player can toss an opponent away from them. And when you see power ups, be sure to grab it to increase your character's speed and attack power.