The prototype ROM of Sonic the Hedgehog 3, which was suspected to be created in October 1993, was exposed and contains a large amount of game development data. After more than 25 years of snow, this dusty history of Sonic game was made public on the Internet.
Sega Technical Institute (STI) began producing a sequel to Sonic The Hedgehog 2 in 1993. At the time, the team’s idea was to create a pseudo-3D isometric 3D game like Sonic 3D Blast, which was actually a game with a certain tilted perspective, such as 45 degrees. Typical games are: Age of Empires series, Diablo series, StarCraft and so on.
However, these plans were eventually canceled due to development schedule constraints. Specifically, the Sega Virtual Processor (SVP) chip required to enable 3D games was not ready by the February 1994 deadline for Sega. As a result, Sega re-produced Sonic the Hedgehog 3 with a 2D platform, so it’s closer to the previous work.
In order to avoid repeating the mistakes of the Sonic the Hedgehog 2 leak, Sega will keep the work of secrecy in the development of the new work. They also wanted to cover up the game’s problems – some of which were not resolved until the last days of development. To do this, they have set strict restrictions to prevent the media from seeing or commenting on the game during development. Sega even did her best to limit the game’s exposure, not providing early samples to the media, but only a few screenshots.