Last Gasp Eco-Funnies, 1989
Yes, HUP #3 could have been included in the Complete Comics as well (in theory).
Let's Give a Warm Welcome to...Stan-the-Man-Shnooter!
The Story o' My Life
Point The Finger
letters to HUP
Mr. Natural in He's a Natural Man
Flakey Foont and Devil Girl also appear in the last strip. It's all thin-line style by now of course, but it's all good stuff.