so i recently finished Half Life ˛ singleplayer campaign *SPOILER* but once again, Valve succeeded to make another totally desiring ending anti-climax for HL˛. When Gman appears time stops and appears from nowhere. after that, he disappears into a door to the void. Has anyone yet found out what the purpose of Gman is in Half Life? since i think he's the main clue of the entire story ?!