Experience the ultimate Sonic adventure with Sonic & Knuckles for Sega Genesis. Play as the speedy blue hedgehog or the powerful echidna in this classic platformer packed with loop-de-loops, challenging enemies, and vibrant worlds. Features the innovative lock-on technology that lets you connect other Genesis cartridges for expanded gameplay. This cartridge-only version delivers authentic 16-bit action that defined a generation of gaming. Perfect for collectors and fans of retro Sonic games.