[solo]

I concur on suggested mods and EA, and would also like to try very difficult research.

Otherwise I agree with Meglobob to allow players to select nations, and think first come first served is okay, because many nations have similar versions.

If not all nations are taken, I think it's best to leave out the ones not selected. If only 30 or so want to play, we might consider have each player control two nations instead of one!