During the battle against Robotnik's Giant Eggman Robot, the Master Emerald was destoryed, with it breaking apart into the seven Chaos Emeralds once again and giving Sonic the ability to turn into ...

Sonic Outbound is a Sonic fan-game set one year after Sonic Mania's bad ending where Robotnik had the Phantom Ruby and Chaos Emeralds in possession. After the final battle in the core of the ...