I heard something very recently from a friend that apparently Aperture was a rival to Black Mesa. I think this is a very cool thing since it actually answers why Black Mesa had a portal gun (of sorts) in Opposing Force. The reason? It was an answer to Aperture's portal gun. Company competition for more military funding I suppose. I even heard a rumor that aperture may have been combine backed. Not even Black Mesa was quite as unethical as aperture (willing to kill test subjects like the main portal character). My theory is that G-Man and his "employers" ran with Black Mesa while Aperture was backed by the combine.
if a theory of this sort has been posted before, forgive me.
if a theory of this sort has been posted before, forgive me.