I suppose you need to define real time. Maybe the graphics looked different, but I don’t understand what is so profoundly different aside from improved graphics, all the underlying mechanics are basically the same kind of thing. https://www.youtube.com/watch?v=nxXW_8rcD0k
You move with arrows, the screen updates the dungeon walls. You do or, do not run into things. You fight, or use magic.
I think once you hit oubliette it was multi player and you could make up a party of different real people because PLATO was networked.
Avatar is certainly a multi player game.
Get a sign on at Cyber1 and you can decide for yourself. And then you have to check out the first tank combat wire frame fame and Empire the first top down arena multi player game.
We still play battles in Empire sunday nights.