Sonic Chaos for the SEGA Game Gear (known as Sonic & Tails in Japan) is a landmark title in the 8-bit era, being the first portable Sonic game to feature Tails as a fully playable character with his signature flight abilities. 
 
Key Features
Two Unique Playable Characters: Choose Sonic for a high-speed challenge with his exclusive "Strike Dash" and "Spin Dash" moves, or play as Tails for a more accessible experience using his ability to fly over obstacles and pits.
The Rocket Shoes: Experience a series first with the Rocket Shoes power-up, allowing Sonic to blast through the air and reach hidden areas high above the stage.
Classic 8-Bit Speed: Despite the handheld hardware, Sonic Chaos maintains the fast-paced gameplay the series is known for, featuring six diverse zones including Gigapolis, Sleeping Egg, and Aqua Planet.
Chaos Emerald Hunt: Unlike previous 8-bit entries where Emeralds were hidden in levels, Sonic must collect 100 rings to enter 3D-style Special Stages to earn them. (Note: Tails cannot collect Emeralds, making his mode an "Easy" difficulty setting).
Optimized for Game Gear: Designed specifically for the Game Gear’s color screen, the game features bright, vibrant sprites and a zoomed-in perspective that makes the handheld action easy to follow. 
 
Game Zones
Turquoise Hill: The classic tropical starting point.
Gigapolis: A futuristic, neon-lit city zone.
Sleeping Egg: A quirky, block-filled laboratory.
Mecha Green Hill: A roboticized twist on the iconic landscape.
Aqua Planet: A beautiful but dangerous water-themed ruins.
Electric Egg: The final showdown in Dr. Eggman's high-voltage fortress.
 
Product Specifications
Platform: SEGA Game Gear
Publisher: SEGA
Release Year: 1993
ESRB Rating: E for Everyone (Retroactive)