Appearance-wise, the G-Man appears as an elderly businessman who is encountered throughout the series in various forms and places, often delivering cryptic messages to the main characters, and seemingly controlling them, or at least observing them at all times. It remains a mystery who or what he truly is or what his true role and motives are. He is the overarching antagonist of Half-Life, Half-Life: Blue Shift, Half-Life: Opposing Force, Half-Life: Decay, Half-Life 2 and its subsequent episodes, and the main antagonist of Half-Life: Alyx. The G-Man is the overarching antagonist and anti-villain of the FPS thriller series Half-Life.
~ G-Man while sending Gordon Freeman on his way to City 17. The right man in the wrong place can make all the difference in the world. And all the effort in the world would have gone to waste until.well, let's just say your hour has come again. Not that I wish to imply you have been sleeping on the job.
