Play Metal Sonic in Sonic 3 & Knuckles emulator game online in the highest quality available. Metal Sonic in Sonic 3 & Knuckles 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. Metal Sonic in Sonic 3 & Knuckles is part of the Platform Games and Sonic Games you can play here. PlayEmulator has many online retro games available including related games like Metal Slug, Metal Gear, and Metal Sonic Rebooted.