Dr. Eggman has thrown down the gauntlet, calling out Sonic and friends to join his World Grand Prix. But, just what is the egg-shaped genius really planning? And who are the legendary riders known as the Babylon Rouges that beat Sonic to the signup? At unparalleled breakneck speeds, you’ll catch the turbulence air stream of your board-bound opponents and blaze past them while busting out wild stunts and tricks. Take full advantage of your characters’ talents in speed, power, or flight and challenge up to three friends to find out who really is the fastest rider in the world!Features:All-new air board racing. New blend of snowboarding, surfing, and high-speed racing combat.Innovative "Turbulence" air system. Catch the drift of your opponents and leave them in your wake!Insane tricks. The more difficult trick you pull off, the more points you get!Four-player ultimate battle. New rival group, the Babylon Rogues sets the stage for scorching head-to-head multi-player battles up to four players.Over 13 outrageous tracks, plus multiple modes, and tons of bonus unlockables.Collect and customize your Extreme Gear with over 40 unique types of equipment to choose from, as well as equipment upgrades.Unravel the mystery in Story mode. You’ll play as two opposing teams, complete with cut-scenes.