Sonic the Hedgehog 3 is a platform game developed by Sega for the Xbox 360, serving as a direct sequel to Sonic the Hedgehog 2. Players navigate floating islands where Sonic confronts the villain Dr. Robotnik and teams up with Knuckles the Echidna. The objective includes collecting Chaos Emeralds to prevent Robotnik from launching the Death Egg.
The game is a sequel to the Sonic the Hedgehog 2 for the same system and follows on directly from the end of the game, in which Sonic defeated his enemy, Dr. Robotnik; crash-landing on a floating island, Sonic encounters new character Knuckles the Echidna, and must once more retrieve the Chaos Emeralds while also working to stop Dr. Robotnik from relaunching his ship, the Death Egg.