Sonic Chaos

Sonic the Hedgehog Chaos is a 1993 platform game developed by Aspect and published by Sega for the Master System and Game Gear. Players control Sonic the Hedgehog and his sidekick Miles "Tails" Prower in their quest to retrieve the Chaos Emeralds from Doctor Robotnik, who has stolen them to construct nuclear weapons. Gameplay involves running through stages, collecting rings, and defeating enemies. It is largely based on the Master System version of Sonic the Hedgehog 2, and is thus considered a follow-up to that game. Chaos is the first Sonic game for the Master System and Game Gear to feature Tails as a separate playable character with his own unique abilities.

Japanese studio Aspect, used the knowledge gained from its work on the previous Sonic game while designing Chaos to make it more expansive and faster than its predecessors. Chaos received a generally positive reception initially, with its levels and gameplay being praised; however, in retrospect it has gained a more average response for its unimpressive presentation and lackluster level design, alongside its slow framerate. A direct sequel, Sonic the Hedgehog: Triple Trouble, was released in 1994.