This futuristiccity appears to be controlled by the monopolistic "HEXAeco" energy company, as a majority of the tall buildings and roadways are powered by them.
After his defeat at Ocean Palace, Dr. Eggman has fled into the city, has taken over the industry and is stealing their energy, so Team Sonic sets out to release it from his control. Team Dark realizes that the city must be crushed and be rid of the Doctor's robot army swarming the city (which would also free it). Team Rose continues to follow Amy on her quest to find Sonic, whom she correctly believes to be in the city. Team Chaotix must destroy all of the robots in the city on the orders of Eggman, meaning that Neo Metal Sonic took over the city instead, showing that it must have been a valuable asset to him.
Team Chaotix mission
For this assignment, Team Chaotix are told to destroy all 85 of Eggman's robots around the stage. The extra mission's goal is the same, but with an eight-minute time limit.
The stage is in full length, and if the player misses any enemies along the way, Charmy can use a Warp Flower at the end of the stage and teleport the player back to the beginning of the stage. The number of enemies after passing each Checkpoint and other areas are as following:
In Team Chaotix's mission, after Vector says "Boy, it doesn't look good", Espio says "I'll handle it". However, the subtitles read "Leave this to me".
The Dash Ramp on Team Chaotix's placement is misplaced after the door that leads to the area with bottomless pits.
The energy pipe glass as an object is rendered improperly, causing the walls and all non-object geometry (except for parts of the sky) to be invisible with the sky being viewable from the pipe's glass. This is due to the wrong material render flag being assigned to the object. This happens on all systems besides the PlayStation 2.
This is the first stage which Team Dark is able to explore the most, since Team Sonic can only traverse the shuttle loop course in Super Hard Mode as a teleport collision object is placed the building's pipe that takes the team to the destination (with two vertical platformed blimps on the between them while landing onto a building roof with three enemies).
One of the light decorative objects is located outside of the interior building which was not meant to be there. It was discovered with the help of cheats for the jump and speed modifications.
Ahead from the first Goal Ring in the two-player version of the stage, there are objects that were left unused, such as the Rings that go to the balloon above the metal grill ceiling and the second Goal Ring that is only reachable with the Light Speed Dash. This was originally the location of the goal, but the game developers decided to re-arrange it so that every team had a chance to finish the Stage.