For the fun of exploiting the scientific double slingshot, I started a large pangaea map game with Greece using the technique as described here...
DaveMcW said:
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Scientific Double Slingshot (Civ3, C3C)
Does it annoy you when a scientific AI gets the same free tech as your scientific civ? Never let it happen again!
To pull this off you need a lot of gold in the bank, or optional techs from the previous age to barter with. Finish researching the last tech of the previous age, and a popup will appear congratulating you on entering the new era. Click "What's the big picture" and you will zoom to your research screen - without your free tech!
Hit F4 to tab to the foreign minister and buy the free techs from all your scientific rivals. You may need to gift them into the new age. Pay gold, gpt, anything to get those techs. Hit F1 adjust your gpt income. You will get it all back soon.
Now exit out of the foreign minister and continue your turn. When the build phase finishes check your research screen - you have a different free tech that none of the AIs have. **If you got all the first-level techs already, it will be a second-level tech** like Theology, Industrialization, or Space Flight! Sell it to your scientific rivals to get your money back.
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**bolding by me
... which worked out very well: when finishing the ancient/ma, I could gift the AI into the next age and they fortunately got all the 1st level techs.
However, when I finished the industrial age, no AI made it to computers; I was kind of disappointed, yet amazingly, I got the 2nd level tech recycling for free - despite of lacking 1st level tech computers.
Here's a couple of shots:
One turn to go for modern age:
After exploiting the big picture and thereby regrettably noticing that no AI obtained computers, I got recycling nevertheless:
For the record, this is not a mod and default rules were in use. Of course, I picked the AI rivals manually to get all the sci civs in. Except for Germany, all these sci civs were still alive at this point.
It seems like a glitch; if not, maybe the game's free tech selection is not even depending on the (own) knowledge of 1st level techs: then, the game engine possibly just checks for
any advance (out of the newly entered age) that could technically be researched next (?). If that was true, one could ever (if not regarded as exploit, of course) take the gamble even in case there's only 2 or so sci civs around...
Maybe anyone made a similar observation and could confirm?
[edit: file naming changed]