System Shock - Plot

Plot

In the game's prologue, the protagonist—a nameless hacker—is caught while attempting to access files concerning Citadel Station, a space station owned by the fictional TriOptimum Corporation. The hacker is taken to Citadel Station and brought before Edward Diego, a TriOptimum executive. Diego offers to drop all charges against the hacker in exchange for a confidential hacking of SHODAN, the artificial intelligence that controls the station. Diego secretly plans to steal an experimental mutagenic virus being tested on Citadel Station, and to sell it on the black market as a biological weapon. To entice cooperation, Diego promises the hacker a valuable military grade neural implant. After hacking SHODAN, removing the AI's ethical constraints, and handing control over to Diego, the protagonist undergoes surgery to implant the promised neural interface. Following the operation, the hacker is put into a six-month healing coma. The game begins as the protagonist awakens from his coma, and finds that SHODAN has commandeered the station. All robots aboard have been reprogrammed for hostility, and the crew have been either mutated, transformed into cyborgs, or killed.

Rebecca Lansing, a TriOptimum counter-terrorism consultant, contacts the player and claims that Citadel Station's mining laser is being powered up to attack Earth. SHODAN's plan is to destroy all major cities on the planet, in a bid to become a kind of god. Rebecca says that a certain crew member knows how to deactivate the laser, and promises to destroy the records of the hacker's incriminating exchange with Diego if the strike is stopped. With information gleaned from log discs, the hacker destroys the laser by firing it into Citadel Station's own shields. Foiled by the hacker's work, SHODAN prepares to seed Earth with a mutagenic virus—the same one responsible for turning the station's crew into mutants. The hacker, while attempting to jettison the chambers used to cultivate the virus, confronts and defeats Diego, who has been transformed into a powerful cyborg by SHODAN. Next, SHODAN begins an attempt to download itself into Earth's computer networks. Following Rebecca's advice, the hacker prevents the download's completion by destroying the four antennas that SHODAN is using to send data.

Soon after, Rebecca contacts the hacker, and says that she has convinced TriOptimum to authorize the station's destruction; she provides him with details on how to do this. After obtaining the necessary codes, the hacker initiates the station's self-destruct sequence and flees to the escape pod bay. There, the hacker is attacked by Diego again: Diego is killed in the encounter and the hacker attempts to disembark. However, SHODAN prevents the pod from launching; it seeks to keep the player aboard the station, while the bridge—which contains SHODAN—is jettisoned to a safe distance. Rebecca tells the hacker that he can still escape if he reaches the bridge; SHODAN then intercepts and jams the transmission. The hacker makes it to the bridge as it is released from the main station, which soon detonates. He is then contacted by a technician who managed to circumvent SHODAN's jamming signal. The technician informs him that SHODAN can only be defeated in cyberspace, due to the powerful shields that protect its mainframe computers. Using a terminal near the mainframe, the hacker enters cyberspace and destroys SHODAN. After his rescue, the hacker is offered a job at TriOptimum, but he declines in favor of continuing his life as a hacker.