Half-Life 2
The original Half-Life, released on November 20, 1998, largely took place at a remote civilian and military laboratory called the Black Mesa Research Facility. During an experiment, researchers at Black Mesa accidentally caused a "resonance cascade" which ripped open a portal to an alien world called Xen. Creatures from Xen flooded into Black Mesa via the portal and started to kill anyone in sight. The player took on the role of Gordon Freeman, one of the research scientists involved in the accident, guiding him in his attempt to escape the facility. At the end of the game, Gordon was extracted by a mysterious figure colloquially known as the G-Man who "offered" him employment. Freeman was subsequently put into stasis by the G-Man.
