Sonic Free Riders will be included in the Kinect launch line-up.
The blue hedgehog was flashed on screen during the Microsoft conference, when the 15 launch games were listed.
Also included in the launch line-up are family friendly mini-game packages such as Kinect Sports and Kinect. Adventure.
We saw a couple of the mini-games in the Microsoft conference such as river-rafting from Kinect Adventure.
We've stuck an image of all 15 titles above.
UPDATE: Sega's just announced it.
Sonic Free Riders is an "extreme fast-paced boarding game and is developed to take full advantage of Kinect for Xbox 360," says Sega.
"Full-motion body control will allow you to twist and turn your way through a range of visually stunning courses in an action-packed Sonic experience unlike any other," it adds.
"Choosing from one of your favourite Sonic characters, or your own Avatar, you can reach out and grab a variety of pickups along the course. By throwing, shaking, or swinging your arms to launch your weapon, you can gain the competitive edge over your rivals in high octane single or multiplayer races."