This stage takes place in the same city as Grand Metropolis, and still features the same blue roads that pull the player forward even when they are not running. Vertical versions of these paths also appear, pulling the characters up to a higher level of the plant. There are also sections where the player will ride on a rising circular platform above a bottomless pit, and a section at the end of the level for Team Sonic and Team Dark where they must quickly navigate upward through a large reactor filling with a red energy storage tank.
Story
The teams have entered one of HEXAeco's power generating energy facilities. Now, the primary objective is for the teams to stop Eggman from stealing the city's energy by clearing out the plant. Team Sonic must escape the plant while clearing it of enemies. Team Dark must escape the plant while also fulfilling Omega's desire to smash as much of Eggman's army as possible. Team Rose must escape the plant to follow Sonic.
In this assignment, Team Chaotix must find and destroy three Gold Camerons somewhere in the plant. In the extra mission, they must destroy all five Gold Camerons in the level.
To destroy the Gold Camerons, the player must first destroy or activate all items around it before switching to Espio (if they haven't already). They must then perform a whirlwind to flip the robot upside down and use Vector to destroy it.
Rank requirements
The following is a list of requirements to attain a rank for each mission with each team.[1]
Normal Missions
Rank A
Rank B
Rank C
Rank D
Rank E
Mission 1
Team Sonic
45,000
40,000
35,000
30,000
<30,000
Escape from the chaotic plant!
Team Dark
72,000
62,000
52,000
42,000
<42,000
Escape from the chaotic plant!
Team Rose
45,000
40,000
35,000
30,000
<30,000
Escape from the energy plant!
Team Chaotix
45,000
40,000
35,000
30,000
<30,000
Defeat the 3 gold turtle robots!
Extra Missions
Rank A
Rank B
Rank C
Rank D
Rank E
Mission 2
Team Sonic
40,000
35,000
30,000
25,000
<25,000
Get to the goal ring within 9 minutes!
Team Dark
7:00
8:00
9:00
10:00
>10:00
Defeat 100 enemies (Time minutes.)
Team Rose
3:30
4:00
5:30
7:00
>7:00
Collect 200 rings (Time minutes.)
Team Chaotix
40,000
35,000
30,000
25,000
<25,000
Defeat the 5 gold turtle robots!
Trivia
The erroneous storage tank.
Unlike Grand Metropolis, the blue energy escalators as objects don't have back faces.
In part of the energy storage tank, one of the numbers in level 10 is incorrect, as it instead displays "14".
Could this be... an energy storage tank? 
