Ok, well I'm going to put in my over-rated 2 cents worth.
Oh, and I will also jump on the bandwagon that Sachmo's story inspired me to write. His along with Atrocities and also the first History of the Galaxy thread.
But I just as everyone else have another word document with all information I need. Names of my characters, what their position is, names of ships/bases. Sometime I'll have planet names there too whenever my story develops some colonies.
As far as how I write and wether I have the plot line laid out. Right now I am only 3 turns into my game and I have a few chapters out. It takes me a few chapters before I can advance the game another turn. So I play and write at the same time really. I do as Sachmo does and use alt-tab alot back and forth. When I start writing a chapter I just have a
general idea of what I want to do with that particular chapter. Then as I go along things just keep coming and I add to the chapter to get the end result.
As for how I play the game. I usually play it close to how I normally would but the game story that I am writing now calls for me not to. The people I write about (Hevordians) did not believe in other planets or anything other then their single planet inside this nebula, they do not think there are any other races out there either. They are a highly research devoted people and so I am playing the game at this point by not developing any weapons until I meet another race. Which will be awhile as its a medium galaxy. So I'll be behind as far as weapon technology goes but that will only add to the story and make things more interesting.
But I just suggest you find what works best for you and stick with it. We all have different writing styles and that's what makes all of our stories unique.
I certainly look forward to your future work. Oh, and welcome!

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Ragnarok -
Hevordian Story Thread
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I think...therefore I am confused.
They were armed. With guns, said Omari.
Canadians. With guns. And a warship. What is this world coming to?
The dreaded derelict dwelling two ton devil bunny!
Every ship can be a minesweeper... Once