Sonic 1 Co-op
Mod
Sega Mega Drive/Genesis
Dynamedia Team
Released December 31, 2025
Mod of Sonic the Hedgehog
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.
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Genres
Platform
Themes
Action
Game Modes
Single player
Multiplayer
Co-operative
Split screen
Companies
Dynamedia Team (Developer, Publisher)
Also Known As
Sonic Multilaced · Sonic 1 Two-Player