It's basically Marxism: the Game and one of my favourites of the genre. Something like reforming 1836 near-medieval Russia into the industrial Soviet Union is a huge task with so many strategic elements going into it, and you're planning those out twenty years in advance while holding off European armies and scrambling for colonial resources. The game has been steadily improving over time and mods are starting to proliferate for it.
At full price on day one it was worth it. Definitely get it on sale.