When I've played through these levels before, the map I liked the most in the end was probably Scampies, it's the red and blue one, bottom left on the screenshot.
People that like to play quake1s SP, should really take a look at func_msgboard.
Quote from ThurnipSkacky looks so fresh but also so quake-ish... Could be a official quake add-on at the time
(wouldn't run on 90's machines...)
They could had payed Trent Reznor to make some custom music. So great. I'll take a look on the community.
Which engines are you guys using? The closer to vanilla as possible.
I use Quakespasm