The current incarnation is written in the C++ programming language using DirectX and works on Windows and on the Dreamcast gaming system. Level, animation, and game editors are being worked on through the Retro Sonic SDK.Ī demo of the game was released for the 2007 Sonic Amateur Games Expo. It featured one zone (Egg Gardens) and a custom rebuild of Emerald Hill Zone. Egg Gardens: The egg garden is the main zone in Retro Sonic that features Three acts, Two Badnik Types and a Medium Boss in the 3Th act.The egg gardens are built like a giant green castle that is memorial for Dr.The game features just two zones, one being split in three acts and another in two but both having a boss in the final act.