A few observations as I approach the end of my Babylon game:
1. This is absolutely a domination civ and not a scientific one. I initially started getting worried about tech progression after approaching radio super early and realizing I was absolutely going to need this tech for both aluminum and the eureka. Though I got my spaceport up early with the help of Renya (and spies), it was pretty underwhelming because I didn’t have the Mars mission unlocked for another 20-30 turns. Try as I might, I just couldn’t steal it nor boost it with a Great Scientist. I’m at turn 250 and convinced that I could’ve won with any other civ by now.
2. Babylon works well for people stuck on the tall-focused Civ V mentality. For fun, I only settled 8 cities including the capital - it was super easy to get the settlers out, too, as you’re essentially guaranteed a golden age in the Classical Era and your faith generation should be decent. The Palgum is an incredible UB that makes your cities grow amazingly fast. Despite not settling nearly as much as I usually, not having to focus on campuses really helped get my other yields going faster than normal.
3. In your capital, you’re going to want to go Holy Site first (guaranteeing you a religion), but in your secondary cities, you should start with a Commercial Hub. My thought was this: if you’re going to potentially arrive at spaceports quickly, you’re going to want to ensure you can get them out immediately, and that means just buying them outright. I was shocked at my gold production and nearly bought two spaceports. Trade routes caused my production to be satisfactory, as well.
4. Speaking of production, I found only two wonders necessary - Ruhr and Petra. What’s great about these two is that they’re both somewhat ignored by the AI and they both trigger eurekas. Ruhr completely destroyed any questions I could’ve had about production in Babylon - my capital can produce nearly anything in 1-2 turns.
5. At the end of the game, Babylon is far too dependent on spies. I started transitioning to mass building campuses around the time of spaceports (actually worked well, I wouldn’t have needed them before), and my spies were still milking Korea for tech. However, they all suddenly started dying or being captured, and try as I might to promote them or assign them elsewhere, I just can’t get the tech boosts. It made me cry when one was escaping Korea with Satellites and then was killed when trying to escape on foot.
All in all - super fun civ, but I would love to see someone be able to perfect their late game for science victories. I definitely understood this isn’t what they’re meant for, but Babylon gave me such happy and nostalgic Civ V vibes that I wanted to build more than conquer. Interested to see how other people use them...