10 Video Games That Made You Work Out The Answer Yourself
2. Half-Life
The Question: Who or what is the G-Man?
The G-Man is the single most fascinating entity in the Half-Life franchise, described by Valve itself as a "sinister, interdimensional bureaucrat," whatever the hell that means.
G-Man is a frequent help and hindrance of Gordon Freeman throughout the series, famously offering him a not-so-appealing "job" at the end of the first game and regularly demonstrating an ability to manipulate both space and time.
Even the recent Half-Life: Alyx didn't do much to clarify G-Man's nature or motives, beyond again affirming that he answers to his mysterious "employers."
Honestly, at this point it's unlikely that any concrete answer about who or what G-Man is - an alien? a supernatural force beyond matter itself? - would be satisfactory, and so Valve may opt to simply never reveal the truth.
While it seems probable that a follow-up to Alyx is indeed on the way within the next few years, don't expect to learn a whole lot more about G-Man. And let's face it, it might be for the best this way.