Sega of America and Sega Europe today announced announced Episode Metal, a special unlockable story that will be available exclusively to players who have purchased both Sonic the Hedgehog 4 Episode I and Sonic the Hedgehog 4 Episode II on the same platform. In Episode Metal, experience an all-new adventure that bridges the gap between Sonic CD and Sonic the Hedgehog 4 Episode II! Take cont... more.