I’m playing Black Mesa on Linux, bought through Steam.
A few times in the game so far I’ve gotten stuck in pipes. The worst ones seem to be where roundish pipes go around a curve.
The first couple of times, on earlier levels, I managed to eventually wiggle through, with combinations of hitting jump and crouch and movements, but it was a painful experience.
Last night, on the Residue Processing chapter, I got totally stuck in the curved pipe heading back into the facility near the start of the level. I had to reload and try again, and got just as stuck the second time. I had to switch on noclip to get past it.