It was actually pretty cool how they designed the first room to demonstrate almost every new feature of the engine and how the first level is made to walk you though most of the new gameplay features.
And as I typed that I can still hear the noise all these years later.
Definitely made high school much more fun.
https://archive.org/details/q3DemoTEST
There were multiple test releases. You can find the older ones out on the web.
I wish we could get those days back. Cars loaded with CRT monitors and big machines and bags of all sorts of stuff.
Ah yes, those lab parties.
I to recall the days of all synthesising LSD and playing Quake too.