Hello, it's me, I was wondering if after all these years you'd like to meet.

This subreddit is (mostly) based on realistic systems, borrowing from Civ V, other worldpowers subs, and real human history. As of the start of Mark II, we are in the medieval era. That means that your form of government is likely a monarchy, theocracy, or dictatorship. Of course there are subsets for each of those, like feudal monarchies or absolute monarchies. There were some other types of governance as well; very few classic republics, the occasional representative democracy, a fair number of oligarchies, etc. In general, note that, as nation size increases, there is an increasing need for a stronger, more centralized government. Until modern times, most republics and democracies have been very small. Note that Rome, though initially a Classic Republic, had to shift to a dictatorship to keep up with its massive land gains.

Anyway, unless you are playing a very small game, it is very unlikely that you will be anything but a monarchy, theocracy, dictatorship, or oligarchy. We will allow very few Classic Republics and very few Representative Democracies, but no socialist nations, no communism, no democratic republics, etc. If you feel like you have a valid precedent for another form of government for your nation, feel free to post it here.