While we're trying to get the, possibly too gigantic, first FFA game off the ground, I'd like to propose a game which would be a bit quicker:
Mars Wrecks will be a 6-player free-for-all game with some unique settings to simulate this story:
In 1886, a meteor storm brought a strange mineral to earth, one from which a never before seen fuel could be formulated, a fuel which could allow the burgeoning space exploration initiatives (started by Abraham Lincoln before his death testing a new rocket of his invention in 1878) to finally reach Mars, bringing their extra-terrestrial colonies out to a new planetary body (Luna is getting crowded).
Each player is leading a one-way expedition to Mars with a small colony and military force. They have all the technology of their Industrialized home, but no contact with Earth, so they'll have to build from scratch, including rebuilding many of Earth's world wonders which the people will come to miss in this barren place.
What does this mean practically? I'll be placing the six players, including myself, into a mountainous world with no major oceans, and a very arid climate. We'll all start with all techs up through the Industrial age, but nothing else (we get one settler, a worker and two military units apiece). There will be no city-states and no barbarians. All victory conditions will be enabled except for 'time' (so that the game doesn't stop at 2051).
Post here if interested. I'll take the first five players to commit for this game. If there is enough interest, we can start another game with the same rules for another group. It would be interesting to see them run side-by-side.