Sonic Free Riders is a motion controlled racing video game developed by Sonic Team and published by Sega for the Xbox 360. The game requires the use of Microsoft's Kinect peripheral and was a Kinect launch title in November 2010. Sonic Free Riders is the seventh racing game in the Sonic the Hedgehog series, and the third entry in the Sonic Riders trilogy. It is a direct sequel to Sonic Riders: Zero Gravity. The game's story centers on the series' main antagonist Doctor Eggman, disguising himself as "King Doc of Toreggmania", announcing a second World Grand Prix, secretly planning to gather data from the riders to program into his robots. It is also the first game in the series to be released following a major recasting of the series' voice actors in 2010, except Mike Pollock. Free Riders received generally unfavorable reviews from critics, mainly due to game's motion controls, which were often described as unresponsive and inaccurate. However, some praised its presentation, multiplayer capability, and amount of content.