Sonic, Tails, and Knuckles face a mysterious new adversary, Shadow the Hedgehog, as Dr. Robotnik reemerges after his defeat with a new plan.

After settling in Green Hills, Sonic is eager to prove he has what it takes to be a true hero. His test comes when Dr. Robotnik returns, this time with…

Earth-X is one of many realities in the multiverse, with one glaring difference from our Earth: The Nazis won World War II. Led by The Ray, a group of heroes…