Sonic Utopia is an experimental fully-3D Sonic the Hedgehog fan-game. The idea of the game is to reimagine how the series could be in 3D, without any Polygon Ceiling. It's currently in development but a demo was released in 2016.
The creator of Sonic Utopia, Mr Lange, is unsatisfied with the series' 3D titles. They're not enough like the 2D ones. Sonic Utopia changes this by being more based on the 2D games than Sonic Adventure was. It's meant to be to Sonic what Super Mario 64 was to Super Mario Bros.. Everything is Classic-themed, from Sonic's design to the general art design, and the gameplay is based on the Classic style.
Everything in the demo is built from scratch except for a few placeholder sounds and sound effects from Sonic the Hedgehog: The Movie.
Sonic Utopia provides examples of:
- Fan Game: Sonic Utopia is being designed from the ground-up by a team of Sonic fans.
- Genre Throwback: The Sonic Utopia demo is a 3D version of the Mega Drive titles.
- Green Hill Zone: The demo is a literal 3D reimagining of Green Hill Zone. It expands upon the level by making it a huge, expansive landscape.