Star Light Zone is set in a construction area at night. Eggman doesn't actually attack Sonic in act three Sonic must instead avoid hazards and make it to the top of a vertical path, all while water is rising behind him. In this level, Sonic must rely on air bubbles while avoiding hazards such as swinging spiked balls, spears, and fire-spitting stone heads. Since Sonic can't swim, he is forced to traverse slowly and carefully. Labyrinth Zone is a maze made out of ruins and has been flooded with water. Eggman tries to remove all of the blocks under Sonic's feet in order to defeat him. In addition, there are bumpers, moving platforms, and long slopes that allow Sonic to pick up speed. True to its name, Spring Yard is home to over dozens of springs. Eggman attempts to defeat Sonic by shooting fireballs at the platforms that Sonic is standing on. Below ground, spiked weights, falling magma streams, and fireballs await. Above ground, there are marble ruins and rivers of magma. Marble Zone is separated into two sections. At the end of act three, Eggman attempts to defeat Sonic by swinging a checkered wrecking ball around. Green Hill is filled with waterfalls, palm trees, and Eggman's badnik army. The first and most well-known zone in the game, Green Hill is where Sonic begins his journey. When Sonic enters one of the Special Zones, he must navigate through a rotating maze in order to acquire a Chaos Emerald. There are also six bonus stages called 'Special Zones'. There are seven levels, called 'zones', that are separated into three 'acts'. The game takes place on South Island and each level takes place on a different part of it. However, Sonic the Hedgehog is determined to free his friends and put a stop to the doctor's schemes. These animals are being put into robots, as power sources, and into capsule prisons.

In order to do so, he has captured the animal inhabitants.

Eggman is attempting to steal the six Chaos Emeralds.

Sonic the hedgehog 1 scrap brain zone