Despite the hundreds of Nighmare Dungeons I did with my seasonal character, at first the Sacred in Tiers 3, then the Ancestral in Tiers 4, the Steam achievement ‘Living Nightmares’ does not unlock. I do not know what to do about it… I have posted pictures on the Steam forum, but it looks like nobody from Blizzard really cares.
Do they even reply here from time to time by the way?