I barely progressed through the game, as I was listening to the developer commentary, however it didn't take long for the disaster to reveal itself.
The entirety of the second level in Point Insertion is beyond broken. Missing geometry, visible trigger textures, AIs are either missing or have a broken behavior, and the level transition is straight up missing as well. I had to use the console to get to the next level.
Third map crashed the game at the end, some error involving portals. Level rendering stuff.
So then I booted the first map of Chapter 2, only for it to immediately softlock as Alyx wouldn't register me walking forward lol. I'm calling it here.
I don't know what happened but this is a disaster of a release. Valve truly has fallen off.