i thinks Bite's HL2 speculation about dr.breen is right!
here's a quote:
But who is Dr. Breen? If you ask me, he doesn't exist. He was created by the Combine to give the oppression a human face. It's an old, gentle-looking man, who people are more likely to trust than some gasmask on a screen. It's been mentioned that he was the Administrator of Black Mesa. If this is indeed the case, we can assume he was a powerful player in many governments. When the Combine invaded, he simply chose his side and looked ahead, to see to whom the future would bring victory. Now he acts as a spokesperson for the Combine.
as seen in the new pics of HL2 (and i guess ALL of the ones who is viewing this post have seen them) u can see some future-lab and in the center of it, a screen that displies dr.breen, and he seems unhappy..
i think this kind of lab controls Dr breen's model and dr.breen is actually a human-program!
but still controlled by the combine and used for them...
post your opinions!