Sega has released a new gameplay movie taken from Sonic the Hedgehog 4: Episode II . The video, in addition to offering an overview of the Desert Zone, it also confirms the return of Metal Sonic. In fact, owners of Sonic the Hedgehog 4: Episode I and Sonic the Hedgehog 4: Episode II will unlock free content "Episode Metal", with four additional levels playable with Metal Sonic. The title comes from the Live Arcade on May 16.