Play Sonic the Hedgehog Extended Edition Online

Sonic the Hedgehog Extended Edition is a modified version of the original 1991 Sega Genesis game, developed by fans to expand on the core experience. It was never an official Sega release, but it builds directly upon the foundation of that first platformer, offering more of what made the original memorable without altering its fundamental identity.

You control Sonic, a blue hedgehog who runs and jumps through a series of vibrant, obstacle-filled stages. The main goal is to reach the end of each act while defeating Dr. Robotnik's mechanical creations and rescuing captured animals. Signature mechanics include building and maintaining momentum to reach high speeds, collecting rings for protection and extra lives, and discovering new alternate routes and hidden areas not present in the original game. The pacing is fast and demanding, often punishing mistakes harshly, especially when trying to preserve a large ring count. It feels like a fresh, slightly more challenging tour through a familiar world.