

Gordon begins his quest in City 17 and, with the help of Eli and Alyx Vance, begins to unravel the mysteries behind the rapid changes on Earth. However, the Xen aliens, Combine soldiers, headcrabs, "ant lions," and other enemies threaten everything. In Half-Life 2, Gordon has accepted the G-Man's "offer" and become a government agent on Earth.

Half-Life 2 continues the story of Gordon Freeman, the scientist-turned-marine who managed to escape from the Black Mesa Research Facility in Half-Life.
