In Sonic Riders, Dr. Eggman challenges Sonic and his friends to a Worldwide Grand Prix, and the prize for coming out on top is an ultra-rare Chaos Emerald! Gliding on air boards - which are performance-oriented for each playable character - gamers will experience a heightened sense of Extreme sports-style racing tension as Sonic and his pals perform tricks and stunts over treacherous wide-open terrain.   Sonic is dubbed the speediest on the ground, but will he be able to out run all the others on his air board? Could Dr. Eggman and his legendary air rider group, The Band of Thieves: Babylon, have a shot at winning the Chaos Emerald this time around?