I just started playing HL2, and I'm already stuck at a part.
I'm in the sewer near the start, the one with the big metal bars, tons of Manhacks, and a big ladder going up and down. If you go up the ladder, you go across a big grey tube and end up in another room, with a ladder that goes down and a really big vertical grate separates you from the other room. If you go down the ladder in the room before, you end up in a small room with a big tube that you can go in, but can't reach. There is water on the bottom of the room.
I can't figure it out at all.
Figured it out.