You're my favorite parasite.

No... ringworm's my favorite parasite, you're my second favorite parasite.

I lied... ringworn, then rats with the plague, then you.

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.

Where is the cake? I was told that there would be cake. The cake is a lie.

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...

Man of few words, aren't you?