http://d1x.warpcore.org is down.
This contains the "Minerva" and "Nysa" levels, and the original homepage seems to be this: https://web.archive.org/web/20010608230948/http://www.d3community.com/d3net/spaz/ "All Descent 1, Descent 2, and Descent 3 levels found posted on or within this HTML document are exclusive property of Banning "Spaz" Lyon, Copyright 1999"
Can anyone who has a facebook account please contact the author there, and ask him if the "Minerva" and "Nysa" levels can be redistributed? https://www.facebook.com/banning.lyon
For the time being, LICENSE changed to all-rights-reserved and SRC_URI updated.
games-action/descent1-maps is gone