Sonic the Hedgehog (8-bit)

is a 1991 platform video game in the Sonic the Hedgehog series that was released on October 25, 1991 for the Sega Master System and on December 28, 1991 for the Sega Game Gear. Developed by Ancient, it is the distinct 8-bit version of the more popular 16-bit game. In addition to its original release as a cartridge, the game was later built into some versions of the Sega Master System II in Europe. It was the last game released for the Sega Master System in North America.