This is obviously not an official Sega game, so there's no guarantee it will ever see a full release, especially if Sega requests the game be taken down. Taking on the classic blocky worlds and character models of the early Genesis games - Sonic the Hedgehog 1, 2, 3, as well as Sonic and Knuckles - The Great Lange adds more contemporary gameplay mechanics such as free roaming and 3D combat, as seen in later Sonic titles, such as the Sonic Adventure series and Sonic Unleashed. 'Nearly everything in this demo, from art to sound to the gameplay engine, was made from scratch.' Seen in the footage below, Sonic Utopia marries several different ideas the Sonic series has implemented over the years. 'Sonic Utopia is an experiment that not only tries to expand on Sonic gameplay in an intuitive way in 3D, but also aims to capture the best of Sonic's style and tie it together in a cohesive experience,' a description of the game explains.