Los Angeles - Nintendo on Tuesday announced plans to release a new add-on for the motion-sensing controller for its Wii game console that "allows for more comprehensive tracking of a player's arm position and orientation, providing players with an unmatched level of precision and immersion," as well as "Wii Music," the company's answer to popular games like "Guitar Hero" and "Rock Band." The Wii MotionPlus accessory hooks into the bottom of an existing Wii Remote controller, so that "every slight movement players make with their wrist or arm is rendered identically in real time on the screen, providing a true 1:1 response in their game play."