#16
Alright. You want multiple maps.So, do you want this multiplayer?
You can make a multiple map multiplayer rpg, but it won't be like a campaign. You have to use save/load codes to move around. Theoretically, every map would have to have the same items, save/load code, heroes, and abilities, that the save/load code uses. That way, you can export a hero from map 1 to map 2, with all items intact. Even if an item can only be found on map 2, they could still bring it to map 1 and show it off or something.
If you want this single player, you use the campaign editor. You can store units in game cache, so you won't need to use any save/load code in the campaign. The campaign adds a whole new level of customization, but you can't make it multiplayer, which adds its own benefits.
So, think about what you want in your map. The same map single player will be nothing in multiplayer, and vice versa. You need to customize your map around the benefits singleplayer and multiplayer maps have to offer.