Quick question on hotseat campagign

[riskymonk]

I'm having trouble registering at IGN but I see that you can send the file of your game to the next player via email. Would I need to register for an account to do this or need to access M2 online or can I just use the single player campaign map?

Thanks

[Ventos Mustel]

Hotseat campaigns are played entirely by just sending the save file between players. The online component is only for fighting battles against another player, which doesnt have any clean way of being integrated into a campaign