Fans of Bungie's Myth series will be glad to know that some of the larger map storehouses have been added to The Internet Archive. Thanks to GodzFire on The Tain forum and the original site sponsors, copies of The Mill (http://mill.bungie.org) and Underdogs (uDogs) Group Gaming Hotline Server (https://hl.udogs.net/) will be preserved. Links are as follows:

GodzFire's post on The Tain for The Mill archive
Internet Archive URL

GodzFire's post on the Tain for The uDogs Hotline Server
Internet Archive URL

Another massive pile of Myth series maps is available at https://archive.org/details/UltimateMythMaps.