SEGA has announced Sonic 4 Episode 2 will land on the PS Store May 16, and if you own Episode 1 and purchase the second, you can play as Metal Sonic. While he is a boss in the game as well, those who own both episodes get exclusive access to Episode Metal which is an exclusive zone telling the story of what Metal Sonic was up to during the first episode. Set in the world of Episode 1, you can play stages that have been rearranged for Metal Sonic. The game will run you £9.99/€12.99 and will be accompanied with the release of Sonic PSN avatars. Watch the Metal Sonic below.