Nationalist Fanatic units can execute citizens "ethnic cleansing" in order to gain fervor, or additional xp points. It will be like a weaker version of how the Vampires gain xp. For instance the Einsatzgruppen. In this case, the larger percentage of foreign culture in a city, the more xp they get for exterminating population, although they still get a limited amount of xp from culling the weak of even 100% homeland culture. Although if its 100% homeland, you can only reduce to size 6, wheras if its fully foreign, you can execute all the way down to 1 population, if you have enough Einsatzgruppen, or if the one decides to stay on that city executing for long enough.
I think hitler should have the Aggressive and Charismatic traits, as nothing else really seems to fit him. DarkCiv dissapoints me by giving him protective and secretive. Bombing his own city, his own country, after defeat was enevitable has nothing protective around it. He wrote most of his plans in the book Mein Kampf, viewable by ALL, and he was quite straightforward a fan of the Ragnarok mythology. The only secretive thing about him was keeping his limited family life a stone cold secret. Nothing about how he led his country was protective or secretive. Also, a Nazi UU for the tank should be the Tiger, perhaps extra str (dont remember current tank strength, if tank is 28, tiger should be 30, ect) and +75% vs armor units, and Nazi modern armor replacement should be Tiger 5 or somesuch (maybe Tiger 6?) with 45 str and 25% vs armor and 25% vs infantry. If we want to be real finicky, we should give them better infantry and better planes too (exept for the stealth variety, USA and USSR get the best of those).
And USSR would get cheap fodder for infantry and planes, but some truly badass supertanks to rival the Nazi Tigers. and then later of course the USSR would get good modern jets and stealth planes.
The USA would get average infantry, average navy, cheap-ass fodder sherman-tanks (until Modern armor), and top of the line planes in each era.
Nazis would also have the best Submarines by far, either called "Wolf Pack" or "UnterseaBoot" I prefer the term "Wolf Pack" myself.
Stalin would be Aggresive/ Secretive, while Lenin would be Philosophical/ Expansive.
I think USA should get a Patton leader, who is Organized/Charismatic.
If not, then simply an Organized/Financial leader is fine I suppose, some bureaucrat from history.
However, if you are going to do a President Roosevelt, or the nameless guy after him, an Organized/Protective might be the best approach.
Also, the Nazis and the USSR should each have an ultranationalist unit that can execute population for experience points. These should be, for the Nazis, the einsatzgruppen, and for the USSR, probably the Commissars. Gulag and KGB are good candidates, but they are too much the civil sector, AKA the police force and the spies respectively. And I think we can all appreciate, from Warhammer, a commissar that execute people on the whim. The name could even represent a group of ultra-nationalist Soviets led by a Commissar. The mongols under Ghengis could get a similar nationalist unit at a much earlier tech, to be some sort of mounted war-band.
The mongols should have some cheap fodder units, 3 move that ignore enemy terrain, while the national units could be called Khan riders or something (maybe someone more familiar with the time frame could present better data?) and get not only 3 move and ignore terrain, but commando and blitz as well. Bretty Boss for a Mongol, dontcha think? but I think it would better represent the ferocity of the mongols. They have a superunit, with abilities akin to a tank (and a commando/helicopter) that can gain experience by slaughtering your innocent civilians. (explained as an increase in fervor by killing off "weaker" peoples).
In addition, available at Fascism, you could have a buildable improvement called "concentration camp" which is built by sacrificing a worker. It could start off with the same stats as a workshop, but for each population you execute in the city, it adds a temporary (10 turns) hammer and commerce on each concentration camp tile in the fat cross.
In addition, I think their should be a civic called "ethnic cleansing" which is available as soon as Feudalism (for mongols and such) which enables population to only require 1 food to eat, or quite hopefully, if each concentration camp in the fat cross lowers the food threshold by 1 (the more camps you have, the less food you need) although another way of looking at it is simply giving extra food to concentration camps, to get the desired effect. Although this seems against flavor.
Ethnic cleansing civic would also allow the ultra-nationalist units to sacrifice population for experience points, and allow concentration camps to be built by workers (at Fascism). Also, foreign culture presence would have serious reprocussions, and any executions would probably cause hurry anger. Yet no fear! because we have a new building called a re-education center, which can only be built (and maybe only exists) with the civic "ethnic cleansing" running.
In addition, their could be a Wonder Called "ultra-genocide" or "holocaust" which grants a Re-education center in every city, and doubles the speed that concentration camps are built (or if concentration camps are normally built by sacrificing a worker, workers can now build them normally at a hurried pace).
Additionally, jail-houses would be replaced by Gestapo (nazi) and Gulag (USSR) ... although the Soviet gulags were far more extreme, and the Siberian work-camps were almost equivalent to the Death Camps of the Holocaust. Perhaps while running the State Police civic, you can build a national wonder called something like "Siberia" or "Wasteland" which grants jailhouses in all cities. In addition, Soviet Intelligence agency's should have a UB called KGB.
On the subject, Police State should limit hurry anger, especially the hurry anger from population-wide executions/cleansing, if not remove such anger entirely.
There should also be random events related to much ethnic cleansing, which creates a "Refugee Camp" feature, which (cannot be removed?) or requires declaration of war against the UN to remove it (or the liberal civ of the highest score, like USA or Britain). Also, there should be a UN resolution to out-law the ethnic cleansing civic, and to refuse that would basically mean no foreign trade routes, and possible wars.
There could also be a civic called "interventionalism" which gives bonuses, somehow, for going to war with civs running ethnic cleansing, and the AI running interventionalism would have to be given a higher chance to declare war against people that break resolutions.
Im thinking each civ could have a Pride resource (or maybe it could come from Ultra-Genocide and Ethnic cleansing only, and maybe a Concentration camp has a chance of discovering a Pride resource. The Holocaust(Xenocide) wonder could probably grant a pride resource, as well some event that triggers after killing off the entire foreign culture of any rival civ), and those running interventionalism would have to war and force such civs to basically capitulate and give up their pride resources and stop running the ethnic cleansing civic. Then the pride goes to the victorious allies, as a victory pride, instead of the nefarious xenocide pride. It still has alot of kinks to work out, of course. Interventionalist or Capitalist civic running nations should also get substantial production and commerce boosts for every oil resource under their control. (and perhaps spice resource during the age of discovery) although by the modern era, the spice boosts are obsolete, and they need to aquire oil. Perhaps Optics begins the spice boost, and Biology obsoletes it and begins the oil boost. But it requires running a capitalist and/or interventionalist civic in order to gain the boost.
In addition, with all this dependence on civics, getting a fallen enemy to adopt new civics should become ALOT more important than earlier, and this should be worked into the AI (basically a completely beaten foe should have no choice but to adopt all of their oppresor's civics).
I also think that any civ, if running the right civics, should be able to use the scorched earth policy. I think the policy was first used by Peter the Great in the (1800s?) and then more popularly used by Stalin during WWII, but I think anyone, even non Russia or USSR, should be able to use it upon discovery of .... Civil Service perhaps? Or maybe Nationalism? Basically, its a spell you use, ability, whatever, with a unit in the city. It removes all non-wonder buildings, and auto destroys all improvements in the city's fat-cross still inside your culture.
Speaking of which, the ethnic cleansing ability should also be able to be used out in the country side, only with no experience gain, but you automatically gain full culture of the tile the ability is used upon.
Also, Christianity should give extra culture boosts while islam gives extra science boosts, buddhism gives extra happiness boosts, and Taoism gives extra GPP boosts. Judaism gives extra commerce boosts. Confucianism grants lower maintanence costs, and Hinduism grants extra food and health. These can be tweaked of course, but makes the most sense to me.
I think this version should be called "Pitch Black: sins of mankind"
I admit this post is probably the most offensive thing I have ever typed. But I was going for something really dark, like black soul kind of dark.
Edit: at Gorakshanak, I would rather be another Augustus. Or perhaps a Justinian. Constantine was also kind o' swell. Although my times with other games have grown for a craving of interesting civs like the Mongols and the WW2 red army. AKA the imperial guard from Warhammer(red army), and the hippus from ffh2 (mongols).
Super Edit: I would highly like for fascism, communism, and capitalism to be added as religions, with capitalism giving a gold bonus/ trade route bonus, communism granting .... zero war weariness plus extremely lower maintanence, and fascism granting a production and science bonus (they experimented on their victims with heightened efficiency).
they would be like the three end game super religions.
Ive thought up another Victory condition .... "Divine Imperium" victory. You must be running the God-Emperor civic, be running state religion X, have the holy city for religion X, and all civs in the world must be following religion X. Finally, you must be at peace with all of your followers (the other civs) now you have won a God-emperor victory!