That is an effect we might propose for 0AD as well - like in settlers 4 where often used paths across the grass become dirt roads in the end.

@wowgetoffyourcellphone, nice list. The first person that comes to my mind as an important character at that time is Mani, the founder of Manichaeism, which would become a major religion for a few centuries (would make an important Hero priest). There are a couple problems with this: 1) he was born in 216 under the Parthian Empire, which was succeeded by the Sasanian Empire when he was still a child (I wonder what’s the exact criteria in these cases, but to me it makes more sense to have him with the Sasanians), and 2) the religion would eventually be repressed by the Sasanians, although at the beginning they were receptive to it since it had many similarities with Zoroastrianism, but that started to change around 270, with more intense persecution after 290. I’m not sure how much you are into mutually exclusive techs and alternative history, but all this is a gold mine with that.   Other immediate Sasanian concepts that could be used as techs:   -Just looking a bit back I see that the “Panjagān was either a projectile weapon or an archery technique”, some have said it could have even been a type of arrowhead. I consider the last one, although the least fanciful, the most probable, but most experts disagree with this, probably the archery technique is the most preferred, and to me is a close second. From the sources, and the lack of evidence, being some kind of weapon seems the least probable.   -Seven Great Houses of Iran: the Parthian aristocratic clans of the Sasanian court. More of a civ. bonus since it comes from before. Maybe some champion bonus, but Hero penalty, if no member of those houses would be a Hero, like Rostam Farrokhzad (otherwise I think at some point Hero categories would be nice to have, to deal better with certain bonuses and penalties, as I’ve had this problem before with something else).   -Dehqans: came later, minor landowners. -Khosrau I Reforms: fixed harvest tax (which dehqans collected). Both of these could be consecutive Field techs, the first one a normal bonus, the second one to trickle metal.   -I don’t know if buildings can be upgraded, but for Fire Temples (for civs that have Zoroastrianism as the/a main religion), there are 3 levels (Atash Dadgah, Atash Adaran, and Atash Behram), depending on the grade of the fire they hold (which depends on how it was originally produced, for which they identify 16 different forms, when all are combined and consecrated, that’s the highest fire degree, which is quite complicated to do, nowadays there are only nine Atash Behram, eight in India and one in Iran).   -Maybe the Ayvān-e Kesrā could be the Wonder.

https://github.com/JustusAvramenko/delenda_est/issues/80

I'm glad you found the mod! Let me know what you think of the project, and if you ever want to chat, you can find me more easily on Discord https://discord.gg/EFW7v3G2cg.

Yes, around 20 or so. No idea what you mean by sci-fi, Zelda is pure fantasy XD