Mago City

Mago City is a high-tech mega-city in Korea, ruled by a corrupt conglomerate called the Mago Group. 24 hours prior to the events of the game, the 2.97 million inhabitants of Mago City seemed to disappear, and the city's entire network went dark.
Most of the game's events take place in Mago City, as the protagonist attempts to scale the city in an effort to find Sanabi.
== Infrastructure ==
Mago City is a massive city, built on a mountain to support its incredible size. The city itself is comprised of several different layers, with the more affluent citizens of the city living closer to the top, and the poor living on the ground level. The entire city is powered by a central nuclear power plant, which is controlled from the top level of the city, where Mago Group's headquarters are located.
At the ground level of Mago City is the city's entrance, which leads into the slums. Above the slums is the city's business district, which leads to the entrance to the city's electronics factory, which is apparently the tallest building in the world. At the very top of the city is the upper level, where the wealthy citizens and corporate executives live. Due to the vertical nature of the city, citizens must use flying cars or vertical trains to commute around the city, both of which are owned and controlled by the Mago Group.
As the Mago Group owns the entire city, it operates independently of the government, utilizing its own automated security forces for peacekeeping. It also utilizes automated drones for labor, as the city is populated by Worker drones who can use grappling hooks, similar to the protagonist, to traverse the highly vertical city. When the city's defense network is apparently hijacked, the security drones go rogue, attacking the protagonist as they attempt to progress through the city.
== Throughout SANABI ==
The protagonist is dispatched to Mago City shortly after the death of their daughter, as Colonel Baek requests his aid in investigating the city. Twenty-four hours prior to the protagonist's arrival, the city suffered a total communications blackout, and every single citizen of Mago City simultaneously vanished. Although the military sent multiple investigation teams, none responded, save for a sole survivor, Mari. As the military is inclined to believe Sanabi is responsible, they dispatch the protagonist to the city, due to his prior experience with Sanabi.
Upon arriving at the city, the protagonist discovers that Sanabi has hijacked the city's automated defenses and is shot down by their anti-aircraft guns, forcing him to proceed on foot. As the protagonist searches for Mari, they are attacked by the city's drones, including a large, worm-like crusher originally intended for demolition. Mari reveals that all data in the city's networks have been wiped clean, eliminating any clues as to what happened in the city, along with any leads on Sanabi.
After eliminating the crusher, the protagonist and Mari discover an entire array of additional, dormant crushers, waiting to be activated. In the executive offices, Mari discovers that, to ensure Mago Group's security, the city will self-destruct via overloading the nuclear power plant, and also discovers that Sanabi is hiding at the top level of the city. The two are continuously hindered by the city's automated security systems, as the vertical trains self-destruct to prevent their progression to the top level. They attempt to steal a flying car from a warehouse, but they are stopped by Justice, who destroys the cars and attacks them.
With no other options for reaching the top floor, the two venture into the city's central electronics factory, intending to ride its elevator to the top floor. They are stopped by the factory's Overseer, a massive computer responsible for running and maintaining the entire factory, who attempts to kill them. They disable the Overseer's power supply, guarded by a military-grade security drone, but a massive array of backup cores activate, and the Overseer utilizes a plasma cannon to begin ripping the factory apart from the inside. The two manage to escape through a massive ventilation shaft, utilizing a damaged flying car to reach the top level.
At the top, the two discover that the military have begun to directly intervene, landing automated troops and deploying a massive gunship. The two utilize a flying train to reach the Mago Group's headquarters, where Sanabi is presumably located. Upon arriving, the protagonist discovers that the seemingly abandoned building is in fact full of corpses--the first sign of human beings since his arrival in Mago City. Mari explains that the city is purposely self-destructing to cover up the evidence of "[his] mere existence," and that it has been from the very beginning.
The two are then accosted by Major Song, who attacks the protagonist and takes Mari. After the protagonist defeats Major Song, Colonel Baek appears and explains that the Royal Court intends to vaporize the entire city, and everyone in it, in order to prevent the nuclear explosion. He and Song capture the protagonist, and move him aboard a plane out of the city.
Through data logs stored in the protagonist's mind, the truth behind Mago City and its connection to Sanabi is revealed: Sanabi never existed, and was in fact a false concept invented by the Mago Group to trick the protagonist (revealed to be a datafied copy of the real general) into pursuing revenge against any target of Mago's choosing. Through this, they intended to create an army of weaponized Worker drones, in order to stage an uprising against the Royal Court and take over the country. In order to keep their plan secret, the Mago Group rigged the entire city to self-destruct if any evidence was leaked, jeopardizing the security of the company.
After discovering the truth, the protagonist proceeds back into the city to save Mari, jumping from the plane and arriving back at the ground level. The protagonist scales the entirety of the city, finally arriving at the basement of Mago's headquarters, where Mari had claimed Sanabi was. Mari explains that she had led the protagonist to believe that Sanabi was in the basement in order to stop the nuclear meltdown, saving the lives of the city's residents, who had not disappeared and were instead imperceptible to the protagonist all along. The protagonist sacrifices himself in order to manually disable the power plant from the inside, saving Mari and everyone else in the city.
In the epilogue, it is shown that the Royal Court intends to take direct control over Mago City, having spared it from disintegration when the power plant shut down. The city's residents remain blissfully unaware of Mago Group's responsibility for the chaos in the city, along with their attempted treason. The electronics factory ultimately burns down, as firefighters are unable to stop the Overseer from destroying it from the inside. On the upper level, a mass exodus of citizens depart the city, as they are concerned it is no longer safe.
== Trivia ==
* Mago City is most likely located somewhere in Korea. It is unknown if its location is based on any real mountains.
* Mari comments that the slums of Mago City suspiciously lack houses. The reason for this is never explained.
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