The other night I pushed on with water hazard, my driving and aiming seemed a little off, but I didn't go to many side areas. Eli's lab sorta sucks after lots of playthroughs. You are just waiting for the next dialogue so you can get outside and move onwards. I did Ravenholm with only the gravity gun for old times, was fun. Wasn't sure where I would stop with the buggy. Ended up further than I thought I would.
That bit with the bridge you go under, then later drive on top and race the train .. well someone decided to change that encounter. It seems you can no longer beat it, and the train hits you and kills you, even if you appear to beat it.
You now have to drive out, trigger the train, back up, let it pass, then drive along and out. Its boring as hell. All my other playthroughs, you'd just drive, hear the train coming, hit turbo and see the train coming, you see the gap and its a massive game of chicken, but i'd get out, always .. it seemed riskier than it was. I later looked up and found many others had the same problem.
Oh well saved and quit for that night just after that. Next time will have to park it, get the antlions/nova prospect etc. Some great content ahead!