Play Sonic: Cthulhu’s Island emulator game online in the highest quality available. Sonic: Cthulhu’s Island is a Sega Genesis game that you can enjoy on Play Emulator. This SEGA game is the US English version that works in all modern web browsers without downloading. Sonic: Cthulhu’s Island is part of the Sonic Games, Arcade Games, and Platform Games you can play here. PlayEmulator has many online retro games available including related games like Sonic: Scorched Quest, Sonic: Virtual Adventure, and Sonic: Cthulhu’s Island.