Hi!
what is the largest map anyone ever played
Last week I used my own map: single star, ~140 planets, at least 2/3 of them habitable, 4 teams of 2 players, all AI unfair researchers, me Advent.
Reason for such a big map: I wanted to give AI enough "room" to develop good tech before we'd start serious wars. Reason for teams: AIs don't surrender, if their team mate is stil alive.
When I ended playing after almost 10 hours of game time (more of real time, game was so slow it likely took 2-3 seconds of real time for one game second), I held ~70% of the map, but then I quit, because only one AI (and it's ally without planets) of the opposite teams remained active.
I had quite a good time with that game. Had barely managed to keep my Advent ally alive. His start was exceptionally unlucky: he started as a direct neighbour of a Vasari's HW on one side, and with a single branch of 4 habitable planets (and 3 un-habitable), before he ran into the other neighbour, without a single line to the planets-rich core. He lost all starting colonies before I literarily "crushed" through a human AI to cripple his Vasari AI neighbour.
BR, Iztok