Those of you who already own Sonic The Hedgehog 4: Episode I will gain some additional content. Entitled Episode Metal Lock-On, this unlockable chapter allows players to play as Metal Sonic, and includes four acts that explore the origins of Sonic's metal enemy.
Sonic the Hedgehog 4: Episode II will be released on the 16th May for 1200 Microsoft Points on the Xbox Live Arcade, or £9.99 on the Playstation Network.
