Eli Vance: Ah, Gordon. Here you are. We just sent the sample down to the test chamber.
Scientist 2: We boosted the anti-mass spectrometer 105 percent. Bit of a gamble, but we need the extra resolution.
Scientist 3: The administrator is very concerned that we get a conclusive analysis of today's sample. I gather they went to some length to get it.
Eli Vance: They're waiting for you Gordon, in the test chamber.

Gordon Freeman - it is you, isn't it? The Science Team has been tracking your progress with the Black Mesa security system. Unfortunately, so has the military. That suit of yours is full of tracking devices. Still, it's better than going naked in this place. It's cold in there, and you'll have to hurry. It could sap your suit power in a matter of moments! If you're bent on reaching the Lambda Complex, then you'll want to keep to the older, industrial areas where the security system is full of holes. It's worked for me, so far.

Scientist: "Do you think we should appeal to the alien authorities?"
Scientist 2: "Absolutely not!"

Mister, if you can get the power on, that train will take us straight to the surface. I would try it myself, but it's a long way down the generator room, and there are... things, in the way...

Come in, Cooper! Do you copy? Forget about Freeman, we're abandoning the base. If you have any last bomb targets, mark them on the tactical map. Otherwise, get the hell out of there! Repeat, we are pulling out and commencing airstrikes, give us targets or get below!