By all means scan through this if you prefer to do so.
Things went fairly well in this game. I didn't pop a single SGL. I thought about trying with Carthage after I found a game (with a weak start) using Carthage as my tribe and taking that CB SGL. But, since I would mathematically need 33 and 1/3 starts to get my expected value of an SGL up to 1, it didn't seem all that likely. I wanted something a little easier to get a game going. I had one game going where I had plenty of food for the other cities in my empire, but I had Sumeria in there. I had a war with them that I didn't want and they later beat me to Education and then Astronomy. I thought "O.K., I might lose Cope's." Shortly after they started on Cope's, they started on J.S. Bach's Cathedral. At that point, even though I might have one, I abanonded that game. I found a game much more promising with the same tribe and took Sumeria out.
Wet, warm, 3 billion, 70% archipelago map. I had a game crash one turn before I learned Physics, so I had to start a new session on that. Anyways, since I didn't want anyone industrious so no one would start on The Pyramids too early (such as Colossus-more shields to the Pyramids cascade), and I needed 6 tribes, this meant I needed to put in someone with Alphabet. I selected Rome. Wait... what about those expansionist tribes... the Zulus, the Mongols, and the Arabs?
Well, I selected Germany, Babylon, Rome, Japan, the Aztecs, and the Celts as my opponents. Two scientific tribes for gifting to pick up the tech pace a little. Perisa and the Ottomans tribes might work out O.K., and maybe some or possible all of the one's with Alphabet, but I didn't take any chances. Plus, industrious tribes sometimes can develop too quickly. And, as I said before Sumeria can research all too quickly. I played with this start.
O.K., that doesn't tell you much. I don't know which unit moved first, and since I hadn't taken a picture early on, after I submitted I "reloaded" from the 4000 BC start to give you this screenshot:
Not much grassland, huh... and only two bonus grassland, right? Well, with all that extra food, three hills, and a forest, things can still work out rather well. Plains have the advantage that you can more easily boost their shield output in despotism. Now if you haven't done so already, note the tribe... it's the Portuguese!
Sanabas's guide for upper level 20k games on standard on up maps relies on the Seafaring trait. Well, I had that. Through in a popped settler from a hut, and now Lisbon doesn't have to spit out a settler... ever. That tells you the basic part of my strategy, but as I learned in this game and my earlier aborted game there's more subtlities which can make Portugal quite good for this sort of game... especially if you don't have any SGLs. On top of this, on Demi-God and Deity levels the probability of getting a settler or a city (on Demi-God) comes out higher than most lower levels (you can't do either on Sid). So, once I found a start where I popped a settler early enough I knew I would get off and running (I did pop a settler in the Sumeria game, but there existed some other starts where I didn't pop a settler or a city where I liked it). In this game I popped a settler, and then two cities later on!
This had the effect of strange city placement. On top of this, I ended up with Japan as a neighbor, so I worried about early war. It never came. But, since I had Japan as a neighbor I ended up with a gap between some of my cities and their's and never got enough cities that I had The Forbidden Palace. I worried about all of this, but I don't think it matter much. One subtlety I didn't expect playing as Portugal came as a result of my scouting. Since I had a second scout which I had trained, I had one waiting by a hut waiting for me to tell him to pop it and another one moving out west. It spotted several sources of ivory. So, I priortizied getting a settler out there, founded Emerita on the ivory, built a harbor there, and one in Oporto fairly early on. It yielded some nice trading bonuses also. Go Portugal.
Another subtle effect of playing with Portugal I somewhat anticipated came from some of the 80% water Deity 20k games I've played in the last few weeks. Since I have the number of tribes at minimum, there often exists a good number of islands not claimed by the AIs until Navigation. One thought, which I haven't implemented in any game, comes as to set up specialist farms on these islands to help pick up your science rate. Maybe that won't improve culture all that much, since modern wonders may sometimes come too late to have much effect, but you'll have better units this way. On top of this, even with a small island you may still end up claiming resources later on. I didn't use one, but I think carracks can help here, since you might race to Astonomy anyways. I did, though plop a city down near some iron, so that I could at least build a factory later.
Portugal also has another sort of advantage for this sort of game. As I said before, since you or I have min opponents on and it's archipelago, there exist lots of islands with huts still around for a while. So, you can either wait to pop huts on your home island (if you don't have a neighbor), or you can pop them on other islands say at the end of the ancient ages to pick up your science rate *while* keeping the AIs science rate under control. Even if you have some in the middle ages around, some extra gold might help you cash-rush that improvement sooner. Also, if you pop a warrior very early on, you have an MP source, so you can stock up on more gold. Similarly, the GA from the Colossus (if you pop a city in a good spot or a settler), will give you a little extra gold, will get some wonder(s) out faster to the tourist attraction and 1000 year bonus faster. Don't get me wrong, popping a settler early relies on probabilitistic elements... but you have a much better probability than an early SGL. You can also pop CB and BW, so you might not have to trade for them if your curragh sinks early or something.
In my game, Lisbon went curragh-worker-worker and culture for much of the rest of the game. I didn't do The Republic slingshot... so I wouldn't run out of builds, taking Literature as my free tech from Philosophy. In 370 BC I traded for the list bit of Construction, finished off The Great Library, and revolted to The Republic (which I researched myself). I gifted Babylon and Germany up and they got Monotheism and Engineering for their free techs, both of which I traded for via The Republic.
I actually *like* getting Engineering since it gives you the ability to forest. I had 30 shields post-republic with foresting one of the cows... and I think 27-29 during the ultra-early GA, 24 or 25 without it. I didn't gift Hammy and Otto up right away when I entered the industrial age so I could finish off Newton's safely. They got me Steam Power and Medicine. Once I learned Combustion I gifted Hammy up to Combusion (he still didn't have Atomic Theory) so that he would research me Flight and a turn before I finished Motorized Transportation he had it for me. The next turn I learned Motorized Transportation, traded for Flight and gifted Hammy and Otto up. They got Fission and Computers as their free techs. I couldn't buy either right away, but a turn or two later I could and went for broke (I could trade for luxuries most of the game and gpt also, I didn't need temples or cathedrals really, but built some at the end).
I didn't risk warring with Japan or anyone else for the Heroic Epic. I didn't get a single SGL, as I think I would expect if I knew how many techs I researched first and did the calculations. I got all the wonders that I really wanted and only missed the lower culture wonders really (well the Babs built SETI in the modern era, but that didn't matter much). The rundown:
Palace of Lisbon-4000 BC
Temple-2750 BC
Colossus-2030 BC
Oracle-1650 BC
Pyramids-1275 BC (both got shields from my early GA... since anything built before 750 BC gets old fairly quickly it doesn't hurt... plus you might have a little extra cash early on for cash-rushing or a little faster run to the medieval wonders)
Library-1175 BC
Museum of Mausollos-950 BC
Statue of Zeus-730 BC
Great Library-390 BC
Cathedral-310 BC (I think I had 3-turn anarchy)
Colosseum-290 BC
Hanging Gardens-70 BC
Sistine Chapel-290 AD
University-300 AD (gotta love using AC to rush things in)
Coperncius's Observatory-440 AD
Shakespeare's Theater-600 AD
J. S. Bach's Cathedral-780 AD
Newton's University-880 AD
Universal Suffrage-990 AD
Wall Street-1030 AD
Theory of Evolution-1110 AD
Hoover's Dam-1200 AD
Intelligence Agency-1240 AD
Battlefield Medicine-1275 AD
Research Lab-1350 AD
United Nations-1400 AD
Manhattan Project-1445 AD
Apollo Program-1490 AD
Finish date-1535 AD
It sounds tricky to do in time, but maybe you might find an island in time with ivory if you don't have it on your home island. Oh, and if you haven't guessed already, I had barbarians at sedentary.