When playing the first Civ, my friends and I would start a game on one computer and then share the save file as a way to compete. Outside of MUDs and BBS games,

When playing the first Civ, my friends and I would start a game on one computer and then share the save file as a way to compete. Outside of MUDs and BBS games, I am trying to think of the first multiplayer game we played on token ring? Probably the Doom mod that let you do multi-player and run your own maps.