Fallout: New Vegas

=== Setting ===

Fallout: New Vegas takes place in 2281, 204 years after a devastating nuclear war between the United States and China, known as the Great War. Three major factions vie for control of the Mojave Desert, known in-game as the Mojave Wasteland: the New California Republic (NCR), a democratic republic attempting to restore representative government and maintain law and order; Caesar's Legion, a violent totalitarian army of tribal slavers inspired by the Roman legion; and Mr. House, a reclusive New Vegas businessman who commands an army of Securitron robots and rules as the city's technocratic dictator. As part of an eastward expansion from California, the NCR took control of the Hoover Dam, which provides electricity to the surrounding area. Both Caesar's Legion and Mr. House seek to control the Hoover Dam for themselves and advance their own plans for the region. Minor factions include the Boomers, a heavily armed xenophobic tribe at Nellis Air Force Base; the Powder Gangers, escaped convicts from an NCR correctional facility; the Great Khans, a tribe of drug dealers; the Brotherhood of Steel, a militant organization that aims to secure and hold old-world technology; and the Followers of the Apocalypse, a humanitarian organization providing education and medical services to the impoverished people of the New Vegas outskirt areas.

Story

While delivering a data storage device known as the Platinum Chip to New Vegas, the courier is ambushed by mobster and casino owner Benny, who steals the Platinum Chip and shoots the courier in the head. A Securitron personality named Victor digs out the courier from a shallow grave, and physician Doc Mitchell nurses them back to health. The courier departs to search for Benny and the Platinum Chip. They confront Benny in his casino on the New Vegas strip; the courier can either kill Benny and recover the Platinum Chip or let him escape, after which he is captured by Caesar's Legion.
The courier's actions attract the attention of the NCR, Caesar's Legion, and Mr. House, and the three groups each attempt to recruit them to aid in their efforts. It is revealed Mr. House survived the nuclear apocalypse in a life-support chamber. He created the Platinum Chip, which contains a program capable of upgrading his Securitron army; the device was initially meant to protect Las Vegas during the Great War, but the war began before the Chip could be delivered. After the Platinum Chip was located, the courier was tasked with delivering it to Mr. House. Benny stole the Platinum Chip as part of his plan to usurp Mr. House with the assistance of a reprogrammed Securitron called Yes Man.
Hoover Dam becomes the center of the conflict between the NCR and Caesar's Legion. The player can choose which faction to support, resulting in one of four endings. If the player supports the NCR, they successfully repel the Legion's attack at Hoover Dam and annex the Mojave Wasteland into the Republic. If the player supports Caesar's Legion, they force the NCR to retreat as the Legion conquers New Vegas and the surrounding area. If the player supports Mr. House, the overwhelming Securitron army forces both the NCR and the Legion out of the area, securing control of the region for House alone. Alternatively, the player can usurp Mr. House and take control of the Securitron network themselves with the help of Yes Man, establishing an independent New Vegas.