Spreading Frymonmon's love to RPGuild further, I'm proposing a nation RP set in a world where the Central Powers won the First World War and asserted its dominance throughout the world. Germany is the dominant European power but its influence is declining, the White Army won the Russian Civil War, The British and French empires collapsed as the motherlands drowned in syndicalist revolution and the governments went into exile, the United States is on the brink of a second civil war, Italy is divided, the Austro-Hungarian empire more or less still exists, the Ottoman Empire still exists, and many smaller differences make this world not only very different (I shall supply information on the timeline), but made by the creators to make for an unpredictable world with endless possibilities.
I, as head GM, shall either play as a nation of my choice or -would the turnout be high- not at all, instead I shall then focus on GM'ing the game and all that comes with it.