There are many theories all over the internet talking about who and what is the G-Man, ill try and go over most theories about him in this thread. The G-Man has to be one of the most mysterious characters I know, He is very iconic to the half life series and yet we don't know much about him... He is seen throughout the game's series always following Gordon as a bystander, never getting involved just watching... _______________________________________________________________________________________ First theory is that he is future Gordon freeman, the proof is in the name. "Gordan FreeMAN", this is very poor evidence and the term "G-Man" is slang for "government man". Also in Half Life, In Gordon's locker there is a blue suit very similar to G-Man's. I'm sure this theory was a joke to begin with, Gordon wouldn't go back to the past to torment him self, it just doesn't make sense. BUT, I do admit they do look very similar, Could they be related? Second theory is that all the events that happen after the incident is just Gordon's imagination. The theory goes, Gordon received a radiation discharge which put him in a catatonic state which made him imagine the Resonance Cascade and the whole alien invasion. This would be a big middle finger from Valve, meaning the whole half life 2 and the episodes was adding just game play and nothing benefiting the story in anyway to the series. But if this is the case, why G-Man, Gordon only saw him a twice before the experiment. Is he scared of him? Is it the appearance that made him so memorable? There is some evidence to support this theory though... Near the end of Half life, the scientists voice could be heard "Get him out of there! Shut down the equipment and someone get him out!", although hard to hear in-game through the alien sound effect around it, with no proper explanation as to why. But blue shift and opposing force, had the same story but from two different people, one of them was also hired by G-Man. Another similar theory is that Gordon is being drugged by G-Man. This would explain the hallucinations at the start of Half Life 2 and episode 1. The Combine have drugged the populace though their water supply, so its very possible that G-Man could have drugged Gordon. The G-Man is in control of time, we know G-man is the one who delivered the crystal to Black Mesa, and he knew what will happen. "Prepare for unforeseen consequences." He knew how many lives he would kill by doing this, but what if it doesn't matter, what if he can just turn back the clock and change the future, why would he do that? He may have been testing Gordon Freeman, to see if he was up for the job. Its not very likely this has happened though, "All the effort in the world would have gone to waste....". At the end of HL2, the world slows down, and G-Man appears again. "Time, Doctor Freeman, is it really that time again?". He is simply a fragment of Gordon's imagination; he is not real. This is obviously not true as Gordon is not the only one who has seen the G-Man, but it is an interesting idea, What if Gordon created him by accident? G-Man is a shape-shifter theory. Theory goes that G-Man got his human form in Black Mesa or somewhere else, hence why his appearance is always the same. He is always readjusting his tie as if he is uncomfortable with his form, plus he is always seen with the briefcase, as if he is unable to let go of it. The briefcase is a part of him.. At the end of Half life, when G-man speaks to you, he breathes really heavily between sentences as if he is gasping for air.... Employers? "I have recommended your services to my...err em employers," G-man's English is very good for someone who is not human. That quote is very unusual as its the first time that he paused;stammered, It sounded like he was trying to think of another word, he already knew what to say. But wanted a different word so Gordon wouldn't feel threatened/scared. That's what i think anyway... G-Man is god? The G-Man has nonhuman abilities such as teleporting Gordon and dramatically changing the world. He asks Gordon to do tasks for him, kill the Nihlanth, and combine. Surely if he was god he would have the power to do all this in a click. The Vortigons can stop the G-man from appearing, as soon as the Vortigons were busy with reviving Alyx. The G-Man could speak to Gordon alone. "I wish I could do more than keep an eye on you, but I have agreed to abide by certain... restrictions. Mmm." He planned Eli Vance's Death. In Half life 2: Episode 2, G-man told Alyx to say "Prepare for unseen consequences" to her father while she was unconscious. Upon saying it to her father, Eli Vance falls to shock and asks to be left alone with Gordon. He starts to talk about the G-Man, it is clear that he knows something that no one else knows. The conversation gets interrupted and it is held back for later. But there is no later... As Eli Vance dies soon after the rocket is fired. There is something that he doesn't want Gordon to know. Is Gordon Freeman scared of the G-Man? no real hard evidence against this or for this but the way half life 2 shows the screen changing colour and the eerie music going on in the background. It wouldn't be a surprise if he was. This is all the theories I have heard, correct me if i get any information wrong, What do you think?