Well, I've only been playing for two hours (or so Steam says, it felt like an eternity), and I'm already up to...
Either this game is longer than I thought, or I am just blitzing through it. O_O
...the underground area, where the Cave Johnson recording mentions the army of praying mantis men, presumably not far from the propulsion gel.
Either this game is longer than I thought, or I am just blitzing through it. O_O