I still have levels I've been meaning to try out. Got them right here off to the side under the pile of wires in the drawer I have intentions of organizing after I finish setting up that computer I started building back in 2011.
About 6 months ago I was going through a bunch of old crap and found my old Duke 3D install CD. Just for grins I fired up DOSbox, plugged in my external DVD burner to my Win10 laptop and tried to install it. It makes me lol.