I am just finishing up a win with Huayna on Earth18Civ in BTS. Surprisingly easy win. I just settled 2 cities and built up some tech. Then I put 1 city on the river in Ecuador (built a canal with a fort) and 1 city in all the food on the SE coast (Rio?). Used those two cities to REX south america. Quechuas are great fogbusters, especially with Woodsman III in the jungle.
The jungle once cleared is excellent cottage territory, but I was actually doing ok even before the cottages got online.
Monty took out the Americans, and then declared on me. But I had lots of boats due to the Trireme quest (missed it though), so I was able to keep him from landing any troops.
Emancipation was key for growing cottages fast, along with lots of workers (SE city with lots of food pumped out workers for a while). The plains/hills country just north was space for 3-4 production cities.
Once I got rifling, I invaded Monty, but it took until Tanks before I had them cleared out. At this point my tech rate was through the roof, and I had the game won with an easy space race victory had I wanted to settle for it.
But why waste all those hammers? And I needed to enforce the Monroe doctrine. France had settled Nova Scotia, and Saladin the Falklands. China was running away, and I was a little concerned about him and a Domination victory. He had vassalized France, Greece, Egypt, Mali, and Japan, Russia had vassalized Germany and Rome (with only a couple of cities in Africa left), and Cyrus had taken out India completely and was strong. Russia and Cyrus were warring pretty constantly against China.
Once Modern Armor hit I invaded the old world. Took Madrid, Orleans, Berlin, Paris, London (had culture flipped to France) in the first 2 turns, along with a foothold against Mali. Pretty much warred continually. England peacefully vassalized to me quickly. After I took out Egypt and Mali and France, I got peace with China. Saladin saw the writing on the wall and peacefully vassalized. Russia was the next target, I took out Rome and some Russian cities but then Russia vassalized to China, and I couldn't attack for 10 turns. Sometime in there I had taken out Greece, and so the only person to attack during the peace with China was my friend Cyrus. So I took most of Cyrus' cities before vassalizing the rest, about the time the peace treaty with China wore off and I could attack Russia again.
This is where I sit, I delayed space race a bit and built space parts in minor cities (about 15 turns/part, all simultaneously) once Labs and Elevator were built. My major production cities churned out military. Basically I'm racing to see if I can get Domination before my space race lands in 3 turns. I'm at like 45% land right now, pop is over 50%, don't know if I'm going to make it, I think I have to vassalize Russia to do it.
Long story - summary is South America is all you really need to win the game. I didn't even need to kill Monty, I had plenty even before that. My tech rate in 1978 3 turns from wining is like 5600, I'm getting Future Techs every 2 turns, I've already got 7 of them.
Had I ignored space race I probably could have gotten domination right now, time wasted building the space race buildings (Labs/Wonders) and parts would have been better spent on another 50 or so Modern Armors. But at the time I didn't know how fast the Armors would tear through the old world.
I can post saves if there is interest.