Maybe not quite what you're talking about, but https://www.nationstates.net/ https://www.nationstates.net/ is almost like Model UN the game. Played a bit with f

Maybe not quite what you're talking about, but https://www.nationstates.net/ https://www.nationstates.net/ is almost like Model UN the game. Played a bit with friends back in the day, but missing some of the mechanics of Civ