Welcome to Sonic Chaos - originally titled in Japan as the first of the 2 game Sonic & Tails series for Game Gear! Unlike Sonic 2 Game Gear which only featured Tails in cameos - this was the first Game Gear game where you can play as either Sonic with his super speed, or Tails with his twin-tail flying ability! The zones here include The Turquoise Hill Zone, The Gigaopolis Zone, The Sleeping Egg Zone, The Mecha Green Zone, The Aqua Planet Zone, and the final confrontation - the Electric Egg Zone!
South Islands in BIG trouble! Defeat after defeat after defeat - Dr. Robotnik's going right for the source: The Chaos Emeralds themselves!! He's already gotten the red one, somehow throwing the others into a parallel universe. The shift in power balance has caused South Island to start sinking into the ocean! It's up to Sonic and Tails to collect the remaining Chaos Emeralds and recover the red one from Robotnik before South Island and all its inhabitants go for a looong swim...
At the title screen press Up, Up, Down, Down, Right, Left, Right, Left, Start.
At the title screen, press Down, Down, Up, Up, Left, Right, Left, Right, 1, 2, Start.
At the sound test menu, press Down, Down-Right, Right, 2. You can now throw a fireball while playing.