With the release of the Genesys RPG (by Fantasy Flight Games) on the horizon, I've decided to build an entire campaign world for it. Hopefully they'll create some sort of creative commons or OGL for it, but if not, then i'll also translate the campaign to the 5th edition of the worlds greatest rpg system. (which I might do anyway)
The genre for the setting is called LitRPG. You should look into it. There are a swarm of books in this genre, and they are fun to read. The gist of them, is the characters are aware of their meta-stats like an RPG game. This usually translates to video game style RPG, with leanings toward MMO elements.
The setting i'm developing fits this mold.
Most people aren't able to see the interface, and aren't aware of it. They toil away on their birth world, doing whatever craft, trade, etc life handed them or that they earned through study/perseverance. They're born, they grow old, and they die (hopefully of natural causes).
At the age of 16, people from across the kingdom of Avellyon go through a ceremony called the Rite of Naming. They travel to one of 3 cities, and touch a soul crystal. If it bonds to them, then they become an immortal adventurer. They also pick a new name. Some keep this name to themselves, and others wear it openly like a badge of honor.
They also gain access to the interface. With it they can see their six attributes.
Brawn, Agility, Intellect, Cunning, Willpower, and Presence.
Everything else is tied intimately to these attributes, and they can see how the world changes them, and how they develop. Many adventurers become very tactical about their personal development considering the insight the interface brings.
Their soul crystal also gives them access to the Pylons. These structures are erected along leyline nexus points. Often this is the reason a township or city was even built. From the Pylon comes access to the resurrection shrines, and most importantly, portals.
Even those who aren't bound to a soul crystal can use the portal network. Long ago mages developed a method of compressing unrefined mana into silver and gold to make coins that are called "moons" and "suns". Because of this, silver and gold retain a decent value as well, and is the standard coinage of most people. 1 Sun is worth 10 moons, 100 gold, or 1000 silver. One sun is the exact amount of mana needed to take approximately 1 wagon exactly 10 miles. 5 moons will transport a person and up to 50 lbs of non-worn belongings (reasonable amounts of armor don't count toward the 50 lbs of weight) the same distance.
The entire economy began to revolve around this 2 ages ago. It's kept it's staying power since. There are a few restrictions though that keep trade caravans alive and well. First, suns are expensive, and not always worth it. If the value of the cargo isn't worth more than 10 suns, and isn't time sensitive, it will just be transported the old fashioned way. Also, you have to have been to a pylon to use its portal. Each pylon has a sequence of runes that run up each of its sides. These are the portal sequence to get to that location. You have to touch the pylon (or have attuned to it as an adventurer), and then the portals will let you travel to that destination. New merchants have to do a bit of traveling to establish their travel networks.
This is just the beginning. I have a OneNote thingy setup that has tons and tons of information on this setting. More to come.