Half-Life 2 (2004)
"Half-Life 2" presents a dystopian alternate history of Earth, where the resources of the planet, including the human race itself, are being harvested by an oppressive multidimensional empire, known as the Combine. The game is set around the fictitious City 17, roughly 20 years after the events of its predecessor "Half-Life."
During Half-Life, the scientists, including Gordon Freeman, at the Black Mesa Research Facility, accidentally caused an interdimensional instability known as a resonance cascade and later as the "Black Mesa Incident", when an experiment on an alien crystal sample went wrong. Alien creatures, such as the Vortigaunts and headcrabs, from the borderworld of Xen, flooded into the facility. Gordon fought his way through them and the government cover-up response combat units, making it to the Facility's Lambda Complex. There, the Lambda scientists helped Gordon teleport to Xen, where Gordon destroyed a large alien entity keeping the rift open. Gordon was then suddenly extracted by the mysterious G-Man, who had been watching Gordon over the course of the game. Impressed with his ability to survive against all odds, the G-Man offered him a job before placing him into stasis, which Gordon had no option but to accept.
Some time after the ending of Half-Life, the instability at Black Mesa had attracted the attention of the Combine empire, and they invaded Earth. Humanity surrendered at the conclusion of the resulting "Seven Hour War". City 17 became the home of the gigantic Combine Citadel, and Dr. Wallace Breen, the Administrator of Black Mesa who had negotiated the surrender, was appointed representative and Administrator to supervise the survivors on behalf of the Combine. Unable to breed due to a Combine suppression field, humanity matured. The Combine implemented a brutal police state of Civil Protection officers and Overwatch soldiers by recruiting and biologically assimilating humans and other species. Meanwhile an underground "Lambda Resistance" of humans and Vortigaunts, now working together, was formed, and saw Freeman as a savior who would lead them to freedom.
Gordon Freeman is brought out of stasis by the mysterious G-Man, who inserts him into a train arriving at City 17. After arriving at the station and eluding Combine forces, Gordon joins Lambda resistance members including Barney Calhoun, a former Black Mesa security guard now working undercover as a Combine CP officer, and Alyx Vance, the daughter of one of Gordon's former colleagues, Dr. Eli Vance. After a failed attempt to teleport Gordon to Black Mesa East from Dr. Kleiner's makeshift laboratory, Gordon, re-equipped with the HEV suit and a crowbar, is forced to embark on foot through the city's old canal system. After obtaining an airboat, he battles his way to Black Mesa East, several miles from the city. ...
Did You Know? "Half-Life 2" is the highest rated PC game of all time