Since Half-Life is free for everyone and Steam updated a few things. Here’s a tip to enable the “Hi-Def” models, if you don’t like the original poly models.
disable Options-> Content -> “Enable original models”
It’s a little counterintuitive from the original way, but steam hasn’t updated their support page yet.
https://help.steampowered.com/en/faqs/view/6CF4-96FA-BF4A-329D
From one lobotomy patient to another, thanks for the tip!