Removing Tech - All of it

[Mata]

I don't want the tech tree to progress past the Classical era. Is there any easy way to do this without manually going in and deleting all the techs, then deleting all the structures, units and texts referencing the technologies (As I understand it, if I don't delete all the references to the now-gone techs there will be lots of errors)
I tried setting the research time for certain key techs that lead out of the classical era to ridiculously large values, but this isn't really an ideal solution. What if the AI decides to fast tech to say, Literature, which has a research value of 9e100. The AI would miss out on valuable techs like Monarchy until it finishes researching Literature at 3 billion AD, which would put it at a considerable disadvantage!
I'd be fine with simply removing the technology aspect of the game and just starting with all the classical techs. Is there any way to do this? I'm hoping there's some Research=1 value somewhere I can toggle but it's probably not that simple.
All I want is an eternal dark-ages redneck blood-and-iron forever-war scenario with city management, but without having my units be outdated and deprecated as soon as they reach the enemy borders .

 

[Zurai]

There actually is a "Research=1" variable in the XML files. Not that specific name, though - look for "bDisable" and set it to 1 for every tech you want to NOT be researchable. Those techs won't even show up on the tech tree and no one will be able to research them.

 

[Mata]

There actually is a "Research=1" variable in the XML files. Not that specific name, though - look for "bDisable" and set it to 1 for every tech you want to NOT be researchable. Those techs won't even show up on the tech tree and no one will be able to research them.

Thanks for this!

 

[Zurai]

You're quite welcome

 

[Thalassicus]

There's actually a bug where new, disabled techs show up on the tech tree, they visually replace Future Tech (overlapping each other) instead of not being displayed:

It doesn't have any significant gameplay impact, but a bug nonetheless. Makes it impossible to select Future Tech from the science advisor.

Shouldn't have any problem with disabling existing techs though

 

[lhomme]

Is there any way to restrict eras or techs by player? For example, if I wanted to have a "Barbarians at the Gates" scenario where a human player has a tech advantage but is facing off against multiple AI players? Or to be more specific, a human player with classical tech fighting off three or four teamed up ancient AI civilizations?

Thanks!

Oh btw. I must admit my modding ability is zilch so if possible simple solutions or detailed instructions please.

 

[DSChapin]

I believe the way to do that would be to have an unresearchable tech that was a prereq for other things, and then only give that tech to certain nations.

 

[The Great Apple]

Two ways, you can either do as above, or you can use the disable techs flag in CIV4CilivilzationsInfo.xml to disable the tech for specific civs.