Similar to the previous entry, this is a fan-made modification or ROM hack. This version replaces Sonic the Hedgehog with Shadow the Hedgehog within the original Sonic the Hedgehog game for the Sega Genesis. The specific alterations made to the game would depend on the details of the particular ROM hack. The gameplay experience will be altered to reflect the characteristics of Shadow the Hedgehog.

Shadow the Hedgehog in Sonic the Hedgehog

Shadow of the Beast (USA, Europe)