During the earlish days of the 4th edition of L5R RPG, there was an undertaking to develop a western middle ages nation to interact with. It became a rather impressive setting and had enough ties to make cunning fans set up and take notice.
It went through many updates and tweaks. I did not contribute and honestly...I didn't even write down the hard worker who seemingly did it all.
Not ideal, but at least it will live on.