It was a 2 vs 2 vs 2 vs 2 MP game with my brother. I played the Aztecs, he played Japan. The other teams turned out to be Catherine + Peter, Amanitore + Gitarja and Jadwiga + Frederick.
And, quite frankly, it was one of my favourite games of Civilization VI I had so far!
Started on a continent with Giant's Causeway literally 4 tiles away from my capital, and France a little ways further. Had a lot of fun juicing workers from France and conquering Paris in the ancient era with only Eagle Warriors and one Archer. All with Spear of Fionn, of course! Poor Peter had to deal being the only without a teammate for a long time (more on him later).
Meanwhile, my brother was busy peacefully expanding and setting up really strong Campuses. Next to him, on his continent, was Jadwiga - who had a tundra start and early trouble with barbarians, and thus never did much of anything all game long. So my brother had free reign to do as he pleased with his empire.
After a feud between me and Nubia in the Classical Era (which resulted only in one city to be ceded to the Aztec Empire - Ptati Archers and a geographically well-defended capital made sure I couldn't advance much further than that), I discovered a significantly sized continent off the coast close to my empire. Decided to colonize all of it, take advantage of the 4 extra luxuries that it would present to me.
Meanwhile, Gitarja was doing great, north of Japan - but she never settled a single coastal city the entire game... Despite the slight set back from her teammate (that, really, never expanded much after I beat them), Gitarja did really well, and was easily the best AI player in the game.
You've probably noticed that I have yet to talk about Frederick at all - well, he was waaaaayy north of Nubia, separated by a lot of city states (all of which I managed to Suzerain). I think the AI had some problems dealing with routing units around the city states, they never really got out of the little hole made by Granada and Kabul.
During the peaceful eras, I managed to expand my empire to tens of cities spanning the two continents, all of which were in a constant state of Ecstatic due to my unique abilities, Buenos Aires, and the Colosseum - OH YEAH I built the Colosseum. Just 'cause. Also Huey Teocalli. I didn't
need more amenities, but man did I hoard it all!
My brother had, in the meanwhile, set up an incredibly efficient science output, which in turn meant that I could quickly tech up alongside him without needing to devote too much to building Campuses and the like.
As we entered the Information era, Frederick finally decided to do something and declared war on me. Without a single unit even remotely close to my empire...
Boneheaded move aside, I then took a good look at the world: Frederick, Amanitore, Peter and Jadwiga all had coastal capitals. And I had, by far, the strongest navy. Jadwiga and Peter were bordering Japan too, so it would be ease for my brother to help me conquer them.
And so, we set off to quickly finish with a domination victory - I annihilated Germany, while my brother did the same to Poland. Then, we set up a plan: we would attack Russia by two fronts - I'd take his capital to the east, and he would conquer neighbouring cities to the west. After his capital was taken, we would turn my ships around, and attack Nubia - literally two turns away from Russia by ship.
As for Gitarja, we set up a very special cloud for her - of the mushroom kind. She was the strongest AI by far, but if we prepared things right we could declare war, capture Nubia's capital and capture her capital in the same turn, and win the game.
The plan was put into plan, and while my nuke took a bit longer than expected to be set up (I ended up having to dillydally conquering random coastal Russian cities after I conquered his capital waiting for the nuke to finish), everything proceeded without a hitch!
This marks my first domination victory, and my first nuke, of Civ VI! And man, was it ever exciting to work together with my brother, set up battle plans, and get a mutual win by the end! Sorry, no screenshots as of now - maybe I'll update later with them.
But yeah! It as well worth it to delay Steam from updating the game so this match could reach an end, even if it meant I couldn't play R&F for a week after release.
. I did learn something new this game: how awesome the International Space Agency card is 
