TheTron852

Maybe Ross Scott will create a side episode (like episode 10.5), where he refuses to accept G-Man's offer. And the main episode, where he either accepts G-Man's offer, understanding that there is no other choice... or I don't know. And I think the Freeman's reaction on G-Man would be something like: "Wait a second... I KNOW YOU! You were watching all my steps all the time?! Dammit! I bet, you are an agent of those aliens in human form! Then why you aren't killing me right now?! Did I intrigued you, or something? You think that I am such an awesome badass, so it is not worth killing me? ...AND WHERE ALL MY WEAPONS?!?!"

Well, let's take a look at Barney: he teleported to Xen to set the coordinates for scientists to escape from Black Mesa - and he didn't even wear a helmet or gasmask (like Shephard), or something like that. And he haven't suffocated from the air in Xen! So, I guess, it is able to breath in there. Plus theory: I think the scientists from Black Mesa actually forgot to identicate the atmosphere in Xen. So, that reveals the reason, why all these scientists, that were in Xen (I actually mean these dead bodies in H.E.V. suits) are wearing H.E.V. suits.