I think the reason to the 5% boost is that settling a city gives you more population, which means it takes longer to educate your people due to the increased population.
The way to actually get rid of that boost is in the Civ5Worlds.xml file. Simply change the <NumCitiesTechCostMod> from 5% to whatever you feel is a good value (like 0). You'd have to do this for every map size, however, as it is different between tiny maps, medium maps, huge maps, etc. You could also change the <NumCitiesPolicyCostMod> if you wanted to change how much each new city increases policy costs as well.
The Civ5Worlds.xml file will be in the gameinfo folder of the expansion version of the game you are currently playing. For example, if you are playing Brave New World, it would be located at C:\[your install directory]\Civilization V\Assets\DLC\Expansion2\Gameplay\XML\GameInfo, whereas if you are using the base game only, it would be located at C:\[your install directory]\Civilization V\Assets\Gameplay\XML\GameInfo
I've actually done this myself, scaling the value back to 1.5 on all maps. This has the effect of me (at the higher difficulties, with spies stealing techs from the AI) maxing out my tech at around 1500.
2% for hugeYou could try playing on a large or huge map. The penalty is smaller there (3% for large, not sure about huge) and you'll often have more room to expand too. This doesn't mean you'll be able to spam cities all over the map without gimping your science but you could probably settle a couple more cities than on a standard map.
The discovering of new technologies depends on how many educated people you have, and how well they are educated, not the percentage of people you have educated. If I were to have a group of ten scientists under my command, say, they wouldn't discover technologies any slower just because I hired a couple custodians to mop the hallways.
It's a balance issue that they tried to work out. There's no obvious argument to why more cities would result in less science.
Yes, you can easily mod it out of the game, but there is no way without using a mod. Are you playing with mods? If you are, try to ask in the modding forum if anyone has made such a mod and/or can do it or help you do it.Hi everyone,
Is there a way to remove the extra 5% research cost for every city you build? I think it's not reasonable that more cities will slow your research speed.
Thanks,
Tim