I'm telling you this. (No **** sherlock.)
Superpower 2 is unique. It has deep geographical technology which makes you zoom into the planet Earth to the point of seeing pixelated highways. While that may not be as cool as it sounds, look at the geography around it. Cool huh? But I am going to focus on the more 'economic' side of this game.
SP2 goes in deep with the economic system of the country you picked, and the free will to change your country's market from state controlled, to mixed, to free market, which is pretty awesome considering you can almost take control of 6 sectors and either import or export the amount of the resource you have. Most games don't have such in-depth-ness-ness. You can adjust the spending of specific areas such as health care, education, infrastracture, environment, propaganda (If you plan to be a very, very evil country with a brainwashed populace.), and et cetera. You can adjust your interest levels and see how inflation is going in your country, and adjust the personal tax income to whatever you wish to get the most dough out of it, but it will always result in the cold shoulder of your populace, so be careful when you want to go over 60%.
If you like to focus on the political aspects of this game, there isn't really much for you other than either legalizing/illegalizing a few dilemmas such as freedom of demonstration, freedom of speech, same-sex marriage, woman suffrage, polygamy, etc. But there are also the religions and languages, which you can either allow (Meh reaction from the populace in this religion/language), outlaw (I DON'T WANT THIS LEADER ANYMORE! reaction), or officialize (LEADER 4 LIFE! reaction). You can also participate and make various treaties, where it is also possible for you to play as Turkey and join the European Union with the approval of the countries inside the treaty.
You don't like economic or political but the more military aspects of this game? Well then. NUKES! Yes. Who does not like nukes? I do like nukes. And so do you, probably. You can research military technology to make more military designs such as fighter aircraft, attack aircraft, tanks, bombers, infantry vehicles, artillery guns, and so on and so forth. There is also a ranking system that determines how strong you are compared to other nations, which is influenced by your technological prowess, which ranges from 1 to 10. If you plan to dominate the world with the US, best to start with a lvl. 10 technological level.
And the most important thing?: There is multiplayer. FRIKKIN MULTIPLAYER!
I would definitely recommend this game to anyone with a taste for taking control of a country and changing it around completely. The sky and the autarky bug are the limits! Maybe.