A group of Civilization V players are attempting to play the 4X strategy game using a model government to decide their campaign for them, and currently the playthrough is on turn 120.
The campaign runs on a constitutional democracy, similar to the USA, and there's even a constitution, stating that legislative branches act as lawmakers in the game, and members of the subreddit thread decide how it is played, from social policies to technology and everything in between.
You can register as a voter over at this thread, which even has dedicated press reporting the goings-on. There's currently a war with Siam, though, so if you want to stay out of that sticky situation we wouldn't blame you. Will you be voting?