The player takes the blue video game icon from SEGA to a breakneck high-speed hunt to save the world. Stop Dr. Eggman's nasty plan and measure your powers against another mysterious villain in the latest Sonic game from the team of Sonic Colors and Sonic Generations. Experience. Experience ultra-fast action as Modern Sonic, overcome dangerous chasms and obstacles as Classic Sonic, and use powerful new gadgets as your own personal self-made character. In Eggman's biggest campaign to date, the evil doctor has used a mysterious force to assimilate large parts of the world. But friends have gathered around Sonic to oppose this and strike back Dr. Eggman. Moreover, in the greatest chaos the world has ever seen, another hero rises to help the modern and the classic Sonic. But even these three heroes have their hands full as Dr. Eggman himself knows a new ally by his side.