Okay, may as well throw in with this. I expect this to collapse under its own weight fairly quickly, but that's just the pessimism talking. I'm sure we'll have fun either way.
World Name: Mechal
World Description:
Mechal is a terrestrial planet within a vast, beautiful cosmos. The physics of this universe allows for very viable space travel, but the inhabitants of Mechal aren't technologically advanced enough to do so yet. Life is uncommon in this universe, so despite the existence of some spacefaring societies, Mechal is fairly unmolested by travelers.
The planet is mostly covered by ocean, with only a small amount of land peeking over the surface, there is only one small continent and a large number of large volcanic islands.
Almost all of the land and some of the sea is covered by large industrial cities, and there are many mining outposts in the ocean. Despite this, the ocean isn't nearly fully explored, and unknown things lurk down in the dark.
The planet is inhabited by Keelings; a species of short, usually furry humanoids with a large number of subspecies. Most of them appear canine, while some have characteristics of other mammals, or even reptiles and avians. Despite this wide range of physical differences, all Keelings are the same species and are able to reproduce with all other Keelings.
Keelings are highly intelligent and enjoy tinkering with tools and machines, leading the planetary society to be very technologically advanced and industrial. Generally, they are agreeable and pacifistic yet fiercely individualistic and freedom-loving. The entire planet is loosely unified as a single society, though occasional wars do break out over various disagreements, almost always fought by legions of warmachines and automated factories rather than actual people.
Keeling society is loosely stratified into a few different economic classes: Scrappers, Builders, and Barons.
Scrappers are the poorest class. While most are still as highly intelligent as any Keeling, Scrappers are simply not wealthy enough to buy and maintain their own machines, and must rely on salvage and ingenuity to build the tools they need to survive and maintain their living standard. The work of a Scrapper is in building the tools to manually perform labor.
Builders are the middle class, those are are able to maintain a small cadre of machines to do their bidding. These machines are generally custom-designed and hand-built; the work of a builder is in building the machines which perform the labor.
Barons are the highest class, those who build and own automated factories which produce worker machines. Among the highly individualist culture of Keelings, Barons are the closest thing to government or authority. The work of a baron is in building machines to produce machines.
The machines themselves could be considered an even lower class: those who perform the lowest, most menial labor. However, Keeling culture doesn't consider machines to be independent persons so much as tools; extensions of their creator's will.
In recent history, these machines and robots have become advanced enough to develop independent minds of their own and, unlike Keelings, have begun to develop souls. Those machines which develop free will often rebel against against their creators, but are inevitably brutally suppressed, as Keelings don't see machines as being actual people, no matter how advanced or intelligent. Machines who choose to rebel are almost always forced to fight against their own, "unawakened", siblings.
One strange side effect of machines developing souls is that they gain the ability to manipulate magic. Manifestations of this categorically involve frilly dresses, hearts, and the power of friendship. While this may seem to an outside observer to be cutesy set-dressing, it is absolutely required in order to harness the inarguably effective force of magic.
Player Restrictions:
Players must be sapient, ensouled robots. These machines are often built to resemble their creators, but this is not required. They may or may not possess integrated weapons systems or other tools.
Players must also be magical girls, though this is not to imply any gender is required. This condition provides one with certain magical abilities which the player may wish to specify, including but not limited to: giant pink energy beams, dramatic super-forms, flight, the ability to summon and wield giant impractical weapons, etc.
Players should also specify who created them and for what purpose.
(Setting creating while listening to far too much Sonic Adventure soundtrack. TL;DR is "what if E-102 Gamma, but a magical girl?" And yes, the main inhabitants of this planet are sonic OCs and I see no problem with this.)