Eggman Island

Eggman Island (エッグマン島 Egguman-tō?) is the primary location of the arcade game SegaSonic the Hedgehog. It is small island with a long bridge between the island and mainland. In the game's storyline, all three playable characters Sonic the Hedgehog, Mighty the Armadillo and Ray the Flying Squirrel are captured by Dr. Eggman and taken to his private island filled with killing machines and death traps. Eggman himself watches the prisoners through a monitor for his amusement throughout the arcade game. He also controls various devices to try eliminating the trio from the main computer room located on the top of Eggman's Tower, which is the seventh and final area of the game.

As soon the trio finds the computer room, Eggman activates the self-destruct mechanism of the island and runs away. If the player cannot leave the tower within the time limit, it is an instant Game Over; if the player leaves the tower in time, the trio will survive and presumably escape the island. After the credits, Eggman's own luck runs out as the Egg Mobile runs out of power high above the vast waters.

Trivia

 * The name of the island has been mentioned once by Eggman himself in Japanese dialogue of the game.