G-Man (slang) G-Man (slang) G-Man (short for "Government Man") is an American slang term for special agents of the United States Government. It is specifically used as a term for a Federal Bureau of Investigation (FBI) agent. "G-Man" is also a term used for members of G Division, essentially a British anti-rebel police unit operating out of Dublin Castle prior to Irish Independence in 1922. Colonel Ned Broy uses the term in his official testimony for the Irish Army's Bureau of Military History in their archive of the Easter Rising (1916) and the Irish War of Independence (1919-1921). According to the "Merriam-Webster
G-Man (Half-Life) there are several sequences when the G-Man is talking at close range to the player, and various areas can be seen in the background, including areas from Black Mesa or even areas the player will visit later into the game. In these sequences, the G-Man talks to the player (the player's character never responds or reacts in any way) and can be seen quickly appearing in different portions of the screen, in dream-like sequences. He also appears on TV screens and "Breencasts" dotted around the environment; the G-Man also seems to have techno- or telepathic abilities of some sort, as