Level Select (Sonic the Hedgehog 4)

North Island is the setting of Sonic the Hedgehog 4: Episode I and as well in Sonic the Hedgehog 4: Episode II. It contains four different zones on the left for the game. It also have new zones on the right.

Episode I

 * Splash Hill Zone: A Green Hill-esque zone, bright and colorful, featuring many springs, speed boosters, and zip-lines.
 * Casino Street Zone: A level styled like Casino Night Zone. The level features traditional casino objects, such as bumpers, slot machines, and playing cards.
 * Lost Labyrinth Zone: Based off of Labyrinth Zone, this level takes place in dark caves, which includes various traps, underwater sections, and a mine cart ride.
 * Mad Gear Zone: Doctor Eggman's headquarters, Mad Gear is very much life Metropolis Zone, which includes various moving gears (hence, the name).
 * E.G.G. Station Zone: The final zone of the game, the E.G.G Station takes place in outer space, very similar to the Death Egg Zone. This level features a series of bosses, and then, the final boss, Eggman's Giant Robot.



Episode II

 * Sylvania Castle Zone: An ancient ruin of castles, partially flooded.
 * White Park Zone: A snow-covered land mixed with a carnival.
 * Oil Desert Zone: Based off of Oil Ocean Zone, Oil desert is a ruined oil facility created by Doctor Eggman. (possibly to supply Mad Gear)
 * Sky Fortress Zone: Very similar to the original Wing Fortress Zone, Eggman's vessel flies high in the sky, reaching the final stage of Episode II.
 * Death Egg Mk.II: Yet another rebuild of the original Death Egg Zone. Built around Little Planet, where Eggman awaits Sonic and Tails.