Sonic 1 Redux is a fan-made ROM hack of the original Sonic the Hedgehog for the Sega Genesis. It retains the core gameplay of the original but features enhanced graphics, updated music, and potentially additional levels or gameplay mechanics. The original Sonic the Hedgehog was developed by Sonic Team and published by Sega in 1991, and is known for its fast-paced platforming and iconic characters.  Redux versions often aim to improve upon the original game's technical aspects or add new content, while still maintaining the essence of the classic title. The development of this ROM hack would have been handled by an independent group or individual, not Sega or Sonic Team.

Sonic 1 Redux

Sonic 1 published by EA