Wow, that was fun. First post and first GOTM submission. Pretty excited about it!
The big mistakes I made:
1. Didn't push my religion aggressively enough. I took Fertility Rites, Tithe, and Cathedrals early on, but my two cities next to Egypt got converted to Buddhism before I started spreading my religion. In retrospect, it might have been better to get shrines earlier in my build and buy up some missionaries for spreading into Egypt before Enhancing. Ended up not having Cathedrals until much later.
2. Forgot to adopt Freedom... twice. I kept pushing through Commerce due to sheer thoughtlessness.
3. Delayed building Amphitheaters(!). I don't really remember why I did this? I think I wanted Universities for some reason...
4. Thought I had connected my Petra Powerhouse Production Place by rail. One of my workers woke up because of a nearby Egyptian unit and I moved him to safety, thinking that he had awoken because he completed his railroad, not because of the Egyptian unit. I didn't spot the mistake until one turn before Utopia finished. Not huge, but it would have saved me a minimum of two turns.
5. Neglected exploration. After the game ended, I continued playing for Satellites and found two more Cultural city states. Whoops. I need to get better about building a few Caravels and exploring when the time is right.
6. Missed a few key Wonders, most importantly, Chichen Itza, Alahambra, and the Louvre. Oops. It's especially frustrating that I missed Chichen Itza because I only missed by 3 turns... And I had forgotten to start building it for 4 turns after having gotten Civil Service.
Things I did well:
1. Picked a GREAT Petra city spot. That city was off the hook and had several wonderful cultural wonders, like the Terracotta Army and Christo Redentor.
2. Got a wonder in every city. Nice! This can sometimes be hard to do, especially with a civ like Egypt in the game. It helped having less AIs though.
3. Made good use of my UA. I had 3 DoFs going for most of the game, 2 for the rest of it. With the Leaning Tower, a Garden, the National Epic, and +30% from the UA in my capital, along with 5 filled artist slots... I think I was cranking out +34 GA points a turn!
4. Kept my tech on par with the AI. This is something I normally struggle with in cultural games. This game, I got the Porcelain Tower and signed RAs like they were going out of style. I also settled the GS I got from the Porcelain Tower next to my mountain-jungle city and got that place cranking out MAD BEAKERZ YO. Around turn 275, I noted it was making something like 150 beakers a turn. I think I also built the NC in this city? So way to go me for specializing my cities.
5. Used my spies to keep my two Cultural CS allies locked down. Pretty self explanatory, but it really made things quite a bit smoother.
Made a lot of silly mistakes but still managed to wrap the game up on turn 350 exactly. Settled on the wine. Best move I made the whole game. Sold the wine to Willem early for an extra settler. Had a pretty slow start otherwise because I found a string of desert hills fairly far north of the capital by a mountain range and decided that was where my second city would be. I put the second city down in that hilly region next to the coast. I had the mistaken notion that I was playing on Continents, and so wanted a coastal city. Had I known the terrain better, I would have settled inland for more hills! I did manage to build the Petra in this city and it turned into a monster later on.
Settled my third city on the same river as the second. Put my fourth and final city in the jungle, next to a mountain and on a riverside hill. Got gardens in every city, then made friends with Willem and Alex by denouncing Genghis. Got into an early war with Egypt that lasted almost the whole game with a few outbreaks of peace (Egypt thought I looked like a tasty snack but couldn't get past the mountain range and into my territory). Willem and Alex declared on Genghis a little while later and I continued to denounce for bonus super ultra friend points.
Eventually, the Mongols died, then Alex went a little schizo on us and started picking on Willem and I, seemingly bored with not having a war to fight. Game went pretty smoothly after that, with Alex slowly growing and Willem and I developing a better relationship over time. He eventually went Freedom and we had a continual Defensive Pact going by the end of the game. We never did get attacked by Alex, but it was nice having each others backs.
All in all, a lot of fun, and my first win with Sweden! I only wish I had been able to use the UU!