Hey, it's Shadow! Good timing. The Black Creatures have huge bombs that they're trying to set off in the city! We only have a few minutes before the bombs detonate and destroy the city! You've got to help us!
The first of the 'Pure Dark' levels, Central City is only accessible by taking the evil route in Cryptic Castle (which involves fighting against the Black Arms by helping Eggman defend his fortress). Nevertheless, Shadow's general behavior up to now seems to have satisfied Black Doom as to his loyalties. Before the level begins, the alien leader tells Shadow that his past is "filled with hatred and contempt for the humans", and that he should take revenge on them with his own two hands. To this end, the hedgehog is told to detonate five giant bombs which the Arms have set around the city, which G.U.N. is struggling to secure long enough to have their bomb squads defuse before they are detonated.
Standing in the Arms' way is also Knuckles the Echidna, helping out the human defenders as he did in Glyphic Canyon. Knuckles asks Shadow to help in defusing twenty smaller bombs, which can be accomplished by grabbing a vacuum gun (or Egg Vacuum from a special crate) and sucking the devices up harmlessly. It is unknown if the events that are associated with Central City took place or not. The President has received a call from the Secretary that the Black Arms are invading Central City. The next scene shows Shadow with the Black Arms aliens behind him. Black Doom proceeds to tell him that the humans took their revenge on him and now he must punish them. Afterward you proceed through the level and get ready to do either the hero or dark mission. If the player does Knuckles' hero mission, the city will be saved, but if he/she does Black Doom's mission, the city will be destroyed. If the player takes too long on Black Doom's side, the larger bombs will go lifeless thus botching the mission.
The following weapons can be found in Central City:
Before the Triangle Jump section to the second giant bomb, the player has to hang onto the bottom of the helicopter, and jump off when it rises high enough for them to jump to the roof. After defeating the Black Arms Soldiers, the key in the locked box will be accessible.
Next to the Third Checkpoint is a near unbreakable substance. You can breack it by using the Chaos Blast.
After the fourth Checkpoint, defeat the Black Arms Soldiers and Wings to unlock the spring. Use the spring to launch up to the ledge with the small bombs. Jump over to the ledge with the key after that.
Located nest to the fifth giant bomb located in a locked box. You must defeat the GUN Beetles to unlock it.
After the Sixth Checkpoint, destroy one of the building's walls to reveal the key behind it. The wall you need to destroy will be on the left side, If you are moving forward through the stage. You will need a bazooka-Type weapon or a bomb in order to destroy the wall.
Attack each bomb to detonate it. The first bomb is close to checkpoint #1. The second is after a triangle jumping area on the roof. The third is in a cage close to checkpoint #3. The fourth is locked in a cage in the toxic waste area. After getting past the toxic waste area, destroy some nearby debris to reveal a spring. Jump on the spring and you will find the bomb in a cage. Each cage can be opened by defeating the nearby GUN troops. Some of the bombs can be destroyed with Chaos Blast.