Sonic And Knuckles for Android

Sonic & Knuckles carries on from where Sonic the Hedgehog 3 left off. At the end of Sonic the Hedgehog 3, after Dr. Robotnik's defeat at his Launch Base, the revived Death Egg fell back onto the Floating Island and crashed on top of the Lava Reef's volcanic crater (apparently retconning the ending of the standalone Sonic the Hedgehog 3, in which the Death Egg vanishes in a flash and is seemingly totally destroyed). The evil doctor resumes his goal of restoring the Death Egg, this time by stealing the Master Emerald to limitlessly fuel its engines. This all-powerful jewel, upon which the other Chaos Emeraldsbase their powers, is guarded by Knuckles. Dr. Robotnik was able to fool the echidna into working for him and against Sonic. Upon landing in Mushroom Hill, Sonic discovered a Giant Ring that took him to the Master Emerald.