Blood leaked alpha - graydung (full level walkthrough)
Grayarcs is a level designed by Richard "Levelord" Gray in the leaked Blood alpha.
I'm not sure what this map is supposed to be, but it's got a lot of "fireplaces" using what are clearly the unintended sprites, rooms that bleed into each other, some sort of garden area, and a cool snake made out of sectors.
The "gray" in the map name is Levelord's last name, Gray. The levels with "gray" in their names are older than the ones with "gm" in them.