Ymir is a 4x game about pigs that runs on multiple 80-120 player servers for 2-3 months at a time. Through the duration of a server you go from the stone age to somewhere in "late medieval".
The whole game is very cartoonish, but the mechanics are very, very deep. Some of the guides i've read through feel like fully fledged essays on alternative world economic systems and warfare, but if it had been simplified so americans can grasp with enough hours and effort.

As a 4x game it has from farming village to national levels, and as far as i've seen some 50+ resources, probably more. By the endgame people supposedely control 40+ individually simulated regions, which must be built and planned accordingly, including fortifications and terraforming, altough i haven't seen that yet, and most of said regions are just 'countrysides', farming villages which surround and produce goods which feed into your 'regional centers', aka cities.
Nations can be made of multiple people, each controling this much land by themselves.


Frequent themes are war, diplomacy, citybuilding and sometimes genocide, which is surprisingly recurrent on this game, mostly because the fastest way to defeat a enemy is to truly burn and kill everything and every citzen they have, thus 'genocide' is a frequent response to diplomacy.
I'm only some 600 hours into this game, but it is a bit rough, a lot of diplomacy is conducted by just talking to people directly over long term, and, the economy is a bit goofy, so actually planning stuff together can get rough.

It is also getting a massive update ""soon"".


Writing the third, but aurora 4x isn't exactly a unknown game. Mostly because its infamous for being the "dwarf fortress of sci fi 4x".