Synopsis: When the manic Dr Robotnik returns to Earth with a new ally, Knuckles the Echidna, Sonic and his new friend Tails is all that stands in their way.
Instructions: Use all kinds of devices (Android, IOS, Windows, Linux) but make sure of the internet browser (Edge, Internet Explorer, Chrome, Firefox, Opera, Safari) settings ‘Cookies, JavaScript and Content or Web Content’ should be set to ‘Allowed’.