Half-Life 2 Walkthrough -> Our Benefactors
After a short climb, we jump like rock climbers along the ledges on the left. Then, from the pipe onto the mechanism's ledge and turn left into the passage. When we see a row of moving sarcophagi and lightning piercing each sarcophagus, we jump to the ledge three meters below. We reach a glass bridge, over which two rows of sarcophagi are moving. We board one of them, naturally the far row (to board, you need to approach and press "E"). We ride. We look. We admire.
Citadel
Along the way, you'll notice creatures resembling humans. These are humans, but in the past. After various experiments were conducted on them, they became stalkers—that's what happens to people who are constantly taken from City 17 to Nova Prospect.
At the end of the road, a protective field eliminates all weapons, but a malfunction caused by a failed attempt to destroy the gravity gun disables one of the force fields.
Moreover, the remaining weapons' power will increase significantly. You can now lift and throw much larger objects. What's more, you can now lift and throw living beings!
We pass the monitors where Wallace Breen spouts his propaganda nonsense. This time, however, he's not addressing the residents of City 17, but Gordon Freeman specifically. After the glass bridges, you need to jump down, over a terrifying low edge.
You can throw Alliance soldiers and elites into a cylindrical field—they disappear into it in a rather amusing way. We go to the right and take the elevator up.
There's a force field at the top, which can be disabled by yanking an energy ball from the generator on the left. We disable the next field the same way. In the next room, we call the elevator, which will arrive from above, but not for a while.
We fire back with soldiers, scanners, manhacks, monitors, and energy balls. On the way up, we also attract soldiers or shoot energy balls at them.
Further on, there's another cylindrical energy field. We shoot back and move on. Again, Brin is trying to explain something to us on the monitors, to convince us of something. We jump down and, using monitors, sarcophagi, and soldiers as cover from bullets, move forward and forward.
At the end of our path, a strider will appear. We quickly run past it. Behind the force field at the end on the left, there are energy balls – throw them at the strider.
Then we ride in the sarcophagus again to Wallace Breen... End of Chapter 13. Now Dark Energy.
Source: hl-inside.ru