My Homebrew is a world called "Gaer" rhymes with prayer...
The setting is a large cluster of islands that extend from the equator to the South Pole. Elves dominate, but dwarves and humans have their clusters.
The primary badguys are Goblins/Orcs, which are the same species but called different names by different peoples.
Humans have only been around about 500 years and are split into three main cultures/empires: Thengari (split into 3 kingdoms - typical english nobility/feudal system), the Melcyr Empire (based on the Chinese dynasties) and the Red Empire of Thytis, a religious oligarchy ruled by the high priests of the Red God (god of fire).
There was a Goblin invasion that was driven back about 10 years go, but there are still a few roaming bands in most areas of Thengar and Thytis.
I use Common Magic, Divine Magic and Sorcery with Elementalism. Elves and Goblins can also use Spirit Magic.
There are a couple of big secrets:
1. Humans are from another planet and arrived on a spaceship.
2. Elves, Dwarves and Goblins are all descended from the same species.
3. Most of the world was destroyed in "The Glaring" which killed almost everything about 1000 years ago.
4. The Goblin invasion was caused by Giants moving out of the frozen southern wastes into Goblin territory.
5. The Giants were in turn driven out of their lands by Dragons, which were involved in The Glaring somehow (details are TBD).
I allow Black Powder weapons, but they are only made by Dwarves, who keep the secret of gunpowder to themselves.
A general mix of typical fantasy and sword and sorcery with some Three Musketeers thrown in for fun.
