Sonic the Hedgehog 3 is a 1994 platform game developed and published by Sega. Like previous Sonic games, players traverse side-scrolling levels at high speeds while collecting rings and defeating enemies. They control Sonic and Tails, who attempt to retrieve the Chaos Emeralds to stop the evil Doctor Robotnik from relaunching his space station, the Death Egg, after it crash-lands on a mysterious floating Sonic the Hedgehog 3 is a 2D side-scrolling platformer. Players can control Sonic, Tails, or both. In the former choice, players control Sonic while Tails runs along beside him; a second player can join at any time and control Tails separately. Sonic 3 adds the ability for Tails to fly for a short time by spinning his twin tails like helicopter rotor; when he tires, he falls. Unlike Sonic, Tails can also swim underwater.