Sonic the Hedgehog 3, the third main game in the Sonic series, was released for the Sega Genesis.
Sonic & Knuckles, a platform game that could be connected to Sonic 3 for an extended gameplay experience, was released for the Sega Genesis.
Sonic 3 and Knuckles, a combined version enabling players to experience Sonic 3 and Sonic & Knuckles as a single game through cartridge connection, was released.
Dr. Eggman returns with a plan to conquer Angel Island by capturing the Master Emerald and using its power for his Death Egg project.
Knuckles the Echidna, deceived by Eggman, starts sabotaging Sonic and Tails' efforts to protect the Master Emerald.
Sonic and Tails arrive on Angel Island to investigate the disturbance caused by Eggman's machines and to recover the stolen Chaos Emeralds.
Sonic and Tails confront Eggman's forces in the lush Mushroom Hill Zone, progressing through Eggman's robotic minions.
Knuckles realizes Eggman has been deceiving him and decides to protect the Master Emerald from Eggman's clutches.
After collecting all seven Chaos Emeralds, Sonic uses their power to transform into Super Sonic and defeats Eggman's Death Egg Robot.
During the battle, the Master Emerald is shattered and later restored by Knuckles, protecting Angel Island's stability.
With Eggman defeated and the Master Emerald safe, Sonic, Tails, and Knuckles agree to protect Angel Island and prepare for future threats.
