Mod
Sonic 1 Co-op
About this game
Sonic 1 Co-op is a ROM hack of the original 1991 game for the Sega Genesis. This modification completely overhauls the base engine to support local, split-screen cooperative gameplay, allowing a second player to join as either Tails or a duplicate Sonic.
Sonic the Hedgehog is a 2D side-scrolling platformer developed by Sonic Team and published by Sega for the Genesis/Mega Drive. Players control Sonic the Hedgehog, who can run at near supersonic speeds and sets out on a quest to defeat Dr. Robotnik, a scientist who has imprisoned animals in robots and seeks the powerful Chaos Emeralds.
In his attempt to steal the six Chaos Emeralds and harness their power, the mad scientist Doctor Robotnik has trapped the animal inhabitants of South Island inside aggressive robots and stationary metal capsules. Sonic the Hedgehog sets out to thwart Robotnik's plans by freeing his animal friends and collecting the emeralds himself.
Screenshots
Trailers & videos
Teaser
Game facts
Release date
Dec 31, 2025
Developer
Dynamedia Team
Publisher
Dynamedia Team
Platforms
Sega Mega Drive/Genesis
Genres
Platform
Themes
Action
Game modes
Single player, Multiplayer, Co-operative, Split screen
Perspective
Side view
Editions & related releases
More games to explore
Game data and artwork via IGDB.