This update is the Graphics update. After a few months, I hope it's been worth the wait.
This update finally adds state-of-the-art Tweaked Graphics, alongside a few sound updates. Those guys at Valve are quaking in their boots knowing how much effort was put into this update.
To install, copy and paste everything from inside the mod folder and dump it into the Half-Life game folder, and let it replace some files. Enable custom addon content in the menu to see the new models.
It took me a few seconds, but I eventually figured out that this screenshot is the room just past where you can first get the shotgun in Office Complex - it's the section where you have to shoot the zombie to save the Barney, who opens the gate for you..
...I need to get out more.
lol I like all the references