Sonic the Hedgehog on the Sega Genesis is a fast-paced side-scrolling platformer that introduced players to Sega’s iconic blue mascot, Sonic. The gameplay focuses on high-speed platforming, where players race through levels filled with loops, ramps, and enemies, using Sonic’s signature spin attack to defeat foes. Collecting rings serves as both a score mechanic and protection, losing them upon damage but staying alive as long as at least one remains.