At the end of Route Kanal, we got introduced to our new ride:
We get on the boat and start on down the river. Early on we find a red barn that turns out to be Station 12, which was being announced over the earlier radio broadcasts as officially offline. When we first see the building, we see G Man standing just outside, watching us. As we approach, he wanders off, but not before making us REALLY CURIOUS. Unfortunately, upon investigating the area, all we really find are the remains of a resistance base, and the head crab mortar shells that took them out.
One interesting sight we see in this area is a broken propaganda sign off in the distance. For the first time we are seeing the larger effectiveness of the Resistance movement, and we are reminded that the Combine are fighting a serious battle with the denizens of earth.
Aside from those little tidbits, this segment is largely just setting up the helicopter boss fight. We DO get another glimpse at G Man, and another resistance camp that talks about needing to evacuate due to the increased Combine activity. Just enough to keep us aware of what's happening in the world.
- Black Mesa East -
Upon arriving at Black Mesa East, we get another dose of character information, much like when we were at Kleiner's lab. Here we first see Dr Mossman who talks about how nice it must have been to see Kleiner and Vance when they were at the top of their field, subtly implying that they are old and irrelevant in her eyes. She keeps talking, and mentions the new teleportation technology they are developing, and mentions that even the Combine do not have this technology, and that it would change the war completely.
As she's talking, we are given a few little bits of visual information in our environment, mostly that the Vortigaunts are helping out in all manner of ways now. We see a man playing chess with one, another is cooking dinner for the base, and a third is repairing broken equipment, clearly showing that Vortigaunts are a major part of the resistance fight against the Combine, and are happy to blend in to daily life.
We get a bit of a history lesson here as well.
This cork board tells us the entire history of how this happened. Apparently, 7 hours after the resonance cascade brought the Combine into our world, Dr Breen negotiated a complete surrender in exchange for a position of power. Eli corroborates what the board tells us, as well, and now we know how we got to where we are. All thanks to probably a single texture map and two lines of dialogue. Efficient!
Alyx Vance walks in and immediately begins fighting with Mossman. The two butt heads and Eli suggests you and Alyx wander outside and get Gordon familiar with the Gravity Gun. We meet DOG out here and have a grand time playing with physics toys, until our good time is ruined by a Combine raid, and we're forced down the tunnels into Ravenholm
- We DO Go To Ravenholm, Apparently -
Ravenholm is a narrative dead zone (pun intended). Literally nothing of significance happens here. We meet Father Grigori, but he doesn't play a role later on in the game, he's simply an interesting bit of set dressing to keep us entertained. No, Ravenholm serves no purpose to the story, but is instead a place to get you used to the Gravity Gun's combat. Apparently Valve considered the weapon important enough to devote an entire chapter of the gameplay purely to allowing the player to come to terms with it. The whole section is filled to the brim with physics toys, interactive traps, and every other shiny mechanic that Valve wanted to show off.
And once Valve is done showing us all the cool things its engine can do, we are returned to the world above and dropped onto Highway 17.