Sonic Chaos

Sonic Chaos is a platform game for the Sega Master System developed by Aspect and published and released by Sega in Europe on October 25, 1993. It was later released for the Sega Game Gear in Japan on November 19, 1993 under the name Sonic & Tails (ソニック＆テイルス, Sonikku to Teirusu), on November 23, 1993 in North America under simply Sonic Chaos and in Europe in November 1993 under the same name. It was the last platform based Sonic game released for the European Sega Master System.

The Sega Game Gear version was re-released in 2003 as a hidden game in Sonic Adventure DX for the Nintendo GameCube and PC and as an included game in Sonic Mega Collection Plus on the PlayStation 2, Xbox and PC. In 2009, the Master System version was released on the Virtual Console.

Sonic Chaos was the first 8-bit Sonic title to feature Tails as a playable character, and also the first in the series to allow the player to manually control his flight. A sequel, titled Sonic Triple Trouble, was released in 1994.

Sonic the Hedgehog: Triple Trouble

Sonic the Hedgehog: Triple Trouble, later released in Japan as Sonic & Tails 2 (ソニック＆テイルス２, Sonikku to Teirusu Tsū) is a platform video game in the Sonic the Hedgehog series, for the Game Gear. It was developed by Aspect and published by Sega in 1994. It is the sequel to Sonic the Hedgehog Chaos, which was the first Sonic & Tails game in Japan. The game received mixed reviews, with critics typically commenting that the game is enjoyable but too easy and has too little to differentiate it from previous Sonic games. Sonic the Hedgehog: Triple Trouble was re-released on the 3DS eShop on March 14, 2012 in Japan, March 15, 2012 in North America, and on March 29, 2012 in Europe.

Story

Dr. Robotnik managed to capture all of the Chaos Emeralds, but an accident in the testing phase of his new ultimate weapon, the "Atomic Destroyer", scatters the Emeralds all across the island. While Sonic and Tails are out to retrieve them, they are cut short by Knuckles the Echidna. Robotnik finds the yellow Emerald first, and dupes Knuckles into believing Sonic and Tails are out to steal the Emeralds.