Lock and load your Sega Genesis for the ultimate blast processing experience with Sonic & Knuckles, the revolutionary platformer that changed the 16-bit era forever. In this legendary adventure, you will sprint through the lush, mysterious environments of Angel Island, utilizing Sonic the Hedgehog's blistering speed or Knuckles the Echidna's powerful gliding and wall-climbing abilities to thwart the evil Dr. Robotnik. This special Not for Resale edition of the cartridge features the groundbreaking Lock-On technology, allowing you to physically connect other classic cartridges to unlock new playable characters and exclusive levels. Prepare to run, glide, and spin-dash your way through gorgeous zones to save the Master Emerald and secure your piece of gaming history today.