Introduces a few new faces to the Sonic world and it is a lavish gaming world mainly made of water showing off the raw power of the hardware to produce wondrous lighting effects and effortlessly fling around detailed polygons at Sonic speed. There is a very special motion blur effect when Sonic hits mach speed realistic enough to induce motion sickness. And there are plenty of sub quests to savour on the way to meeting our old friend Doctor Eggman. Celebrating the fifteenth Sonic Anniversary in style.