Deep in the bowels of the Black Mesa Federal Research Facility, a decommissioned missile base, a top-secret experiment goes terribly wrong. As aliens come through the walls and a military death squad shoots everything in sight, young research associate Gordon Freeman must scramble to stay alive. Find your way through...

Half-Life 2, the sequel to Half-Life, is a first-person shooter video game and a signature title in the Half-Life series. It is singleplayer, story-driven, science fiction, and linear. Developed by Valve Corporation, it was initially released on November 16, 2004, following a protracted five-year, $40 million development cycle, during which...