SEGA has announced it has shipped Sonic Riders: Zero Gravity, a fast-paced new Sonic racing game developed for Wii and PS2. In Sonic Riders: Zero Gravity, Sonic takes on to futuristic-inspired tracks and travels as far as outer space to push the limits of speed even further. Two new unique gravity control moves will allow players to outrace opponents while navigating walls, drops, and hairpin turns. Innovative new tracks take full advantage of Sonic’s new moves and offer heart-stopping racing action enhanced by high-intensity speed boosts.