Product Description: Join an epic high-speed fight to save a world decimated by Dr. Eggman and a mysterious villain in the newest game from the team that made Sonic Colors and Sonic Generations. Experience fast-paced action as Modern Sonic, catapult past perilous platforms as Classic Sonic, and use powerful new gadgets as your very own Custom Hero Character.

Story
In Eggman's greatest victory to date, the evil doctor has conquered much of the world with a mysterious new power. A resistance comprised of Sonic's friends is formed to fight back, and in the midst of the chaos and destruction, an unlikely hero will rise up to help Modern and Classic Sonic take back the world. Even these three heroes may have their work cut out for them, as Dr. Eggman has a new ally of his own...

Features:
Three types of gameplay: Fast paced action as Modern Sonic, thrilling platforming as Classic Sonic, and utilize powerful gadgets as your own Customer Hero Character!
Fight against a brand new mysterious and powerful enemy, Infinite!
Featuring an all-star cast of well-known Sonic franchise heroes and villains!