Sonic Saturn was a project that was in development in 1995/1996 by Sega Technical Institute (STI), along with Sonic X-treme. This prototype was created by Peter Morawiec, the coder of the Sonic the Hedgehog 2 Special Stages, with an interesting 3D engine that was more “realistic” than the ones used in X-treme. It seems that Yuji Naka did not like this prototype, and so the Sonic Saturn Engine was never used to develop a full Sonic game. STI tried to use the engine to create some Bonus Stages to add in Sonic X-treme and the Saturn version of Sonic 3D Blast: Sonic Pool. Due to the lack of time, they abandoned them in favor of a 3D version of Sonic 2’s special stages for Sonic 3D Blast.