So, I don't know if this is an actual game, or a homebrewed thing that my friend's friend came up with. They play it as a weekly email game. Players play as rulers of a kingdom and start in random locations on a HUGE hex map. Players only get one turn a week (which represents a month in game time), but can take as many actions as they can afford. Each ruler starts with a set amount of gold, but generate revenue from the lands and people they control. You buy military to send out, explore and claim land. Of course, you're going to run into other rulers, and that's where things get good. Do you war? Can you AFFORD to go to war? Do you arrange a truce? Do you begin a trade?

Now, my concern with doing this in a PbP format is that there's not a whole lot of social aspect. At least not until kingdoms start discovering each other. I'm thinking of keeping with the once a week update just because of having to keep a different map for each player. Also, the email game my friend plays in has ten players. I'm thinking of only doing 6 at the most.

Hopefully I explained the concept right, if not I'm more than willing to answer questions. Otherwise, I hope there is some interest in this. Maybe even another person (who likes making maps) would be willing to run this with a larger group.

Sounds like play by post Civilization?

I never played Civ, but I guess that wouldn't be totally inaccurate. Other than there's no upgrading of technology.

Sounds interesting. Would be keen to know more about the game mechanics.

It's pretty simple. Rulers start off with X amount of gold, a capitol city, and X population. Each round, Rulers take as many actions as they want, so long as they can afford it. Rulers send the storyteller their actions, individual maps are updated, and the next turn starts. At the start of the new turns players gain income from lands, population, etc, pay upkeep then take actions.