The sequel to Wii launch title Red Steel will only support Wii MotionPlus, meaning you won't be able to play it using just a regular Wii Remote.
"It's a huge risk," said the game's creative director, Jason Vandenberghe. "We have no idea what the penetration rate for Wii MotionPlus will be. We assume high. We would like it to be high.
"I would love to say to you that it'll be compatible with just a regular controller, but the gameplay simply isn't there without MotionPlus. That core experience just isn't there without it," he added, speaking in the latest issue of Nintendo Power (via Nintendo Dpad).
Nintendo's motion-sensing MotionPlus peripheral will release next month, promising to deliver "more comprehensive tracking of a player's arm position and orientation, providing players with an unmatched level of precision and immersion".
Sword and gunplay action sequel Red Steel 2 will be launching in time for Christmas.