After completing each of the special stages and obtaining all seven chaos emeralds, you will unlock the ability to turn into Super Sonic. Collect 50 rings in any stage and then press triangle to transform.
Contributed By: Killago0mba.
Unlock Episode Metal
Players that have a copy of Sonic the Hedgehog 4: Episode 1 on the HDD can unlock Sonic the Hedgehog 4: Episode Metal by completing Sylvania Castle Zone Act 1 and going to the Map screen. A message will show up letting you know that you can now play as Metal sonic in Episode Metal. Episode Metal is four levels from Episode 1 made for Metal Sonic.
Unlockable How to Unlock Episode Metal Have Sonic the Hedgehog 4: Episode 1 on your HDD and beat Sylvania Castle Zone Act 1
Contributed By: Ash_Gamma.
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