I don't know anything about making maps, but I know the existing (official) multiplayer maps very well. Most of them has a goal like be the best one regarding goal X in Y years (e.g. highest industry earnings, player net worth). So it seems like for your map it seems sensible to have the highest net worth. It is possible to set a specific goal, and if noone reaches it in X years, another goal will be decisive, or even everyone will lose. How many years needed to do this would be up to you, but most of the maps last for 20 years (those who do not have a specific goal). There's no Silver or Bronze in MP, you win or lose!:) Another thing you'll have to consider (I feel I've given you a lot of work with this;)) is how many players in total you feel is necessary. I don't like to have to many AI's when I play multiplayer, they have a very... Artificial way of playing! But since you made it for 8 players in total, I guess some AI's are needed. I'll download the maps and try them with single player too. I will be happy to test the MP maps when they finish! Oh, and do try multiplayer, will you? It's really fun!:)