i got to the part after i killed the pit monster and went down into the hole it came from. but i cant figure out where to go next. i assume i need to swim down into the water but there's no openings that i can see
I just got stuck there. I also got stuck:
-- Climbing back up through the Pit Monster room, no matter how many grenades / remote charges I used it always killed me (WTF)
-- The part where you have to "surf" through the radioactive ooze on the back of a barrel/crate/pallet. If this is what you're SUPPOSED to do, the physics simply do not work. I had to cheat/noclip to get past it.
Also, I have gotten killed a lot due to falling off ladders, since the get on/get off code is dogshit (that's Valve's fault though).
The solution is
spoiler (click to show/hide)
a series of pipes above the lake of radioactive waste that you can access
this game is so great and this project is great. Has there ever been a videogame plot-twist as awesome as spoiler (click to show/hide)
the HECU being sent to exterminate the survivors?
cause it's lovely.