EyeToy: AntiGrav combines over-the-top boarding of an "extreme sports" game with the physical interaction of a dancing sim. Designed specifically for use with the EyeToy USB camera accessory, the game has players controlling their onscreen hover-boarder with their own body movements. Eight different characters are available and races take place in eight varied environments, each with multiple paths and shortcuts. Skilled performances unlock new items, upgrades, and additional playable characters. AntiGrav was developed by Harmonix, a studio that demonstrated its talent for creating unconventional "on-rails" gameplay with the critically acclaimed Frequency and Amplitude.