What makes a Dungeon "Mega" to you?
Is it the size? The challenge? The backstory?
Does it need to be deadly? Gonzo? Epic?
Is it a dungeon the players can leave, come back, leave and return yet again? Or is it a mini campaign, where the players keep at it to they hit their goal?
Should it have a goal? and endgame? a way to "win" or should it be primarily exploration and gathering loot?
Barrowmaze, Rappan Athuk and Dwimmermount will all play out very differently, yet they are all megadungeons.
Are some RPG systems a better fit for megadungeons? why?
You would think with all of those questions, I'd have some answers, but no. I have my thoughts on it, but I want to hear your thoughts.
What makes a MegaDungeon special for you?