Unciv/docs/wiki/Miscellaneous-JSON-files.md

• Difficulties.json
• Eras.json
• ModOptions.json
• Generic Civilopedia Text

Difficulties.json

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This file defines the difficulty levels a player can choose when starting a new game.

Each difficulty level can have the following attributes:

Attribute	Type	Mandatory	Notes
name	String	Required	Name of the difficulty level
baseHappiness	Integer	Default 0
extraHappinessPerLuxury	Float	Default 0
researchCostModifier	Float	Default 1
unitCostModifier	Float	Default 1
buildingCostModifier	Float	Default 1
policyCostModifier	Float	Default 1
unhappinessModifier	Float	Default 1
barbarianBonus	Float	Default 0
playerBonusStartingUnits	List of Units	Default empty	Can also be 'Era Starting Unit', maps to startingMilitaryUnit of the Eras file. All other units must be in Units.json]
aiCityGrowthModifier	Float	Default 1
aiUnitCostModifier	Float	Default 1
aiBuildingCostModifier	Float	Default 1
aiWonderCostModifier	Float	Default 1
aiBuildingMaintenanceModifier	Float	Default 1
aiUnitMaintenanceModifier	Float	Default 1
aiFreeTechs	List of Techs	Default empty
aiMajorCivBonusStartingUnits	List of Units	Default empty	See above
aiCityStateBonusStartingUnits	List of Units	Default empty	See above
aiUnhappinessModifier	Float	Default 1
aisExchangeTechs	Boolean		Unimplemented
turnBarbariansCanEnterPlayerTiles	Integer	Default 0
clearBarbarianCampReward	Integer	Default 25

Eras.json

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This file should contain all the era's you want to use in your mod.

Each era can have the following attributes:

attribute	Type	optional or not	notes
name	String	required	Name of the era
researchAgreementCost	Integer (≥0)	defaults to 300	Cost of research agreements were the most technologically advanced civ is in this era
iconRGB	List of 3 Integers	defaults to [255,255,255]	RGB color that icons for technologies of this era should have in the Tech screen
unitBaseBuyCost	Integer (≥0)	defaults to 200	Base cost of buying units with Faith, Food, Science or Culture when no other cost is provided
startingSettlerCount	Integer (≥0)	defaults to 1	Amount of settler units that should be spawned when starting a game in this era
startingSettlerUnit	String	defaults to "Settler"	Name of the unit that should be used for the previous field. Must be in Units.json
startingWokerCount	Integer (≥0)	defaults to 0	Amount of worker units that should be spawned when starting a game in this era
startingWorkerUnit	String	defaults to "Worker"	Name of the unit that should be used for the previous field. Must be in Units.json
startingMilitaryUnitCount	Integer (≥0)	defaults to 1	Amount of military units that should be spawned when starting a game in this era
startingMilitaryUnit	String	defaults to "Warrior"	Name of the unit that should be used for the previous field. Must be in Units.json
startingGold	Integer (≥0)	defaults to 0	Amount of gold each civ should receive when starting a game in this era
startingCulture	Integer (≥0)	defaults to 0	Amount of culture each civ should receive when starting a game in this era
settlerPopulation	Integer (>0)	defaults to 1	Default amount of population each city should have when settled when starting a game in this era
settlerBuildings	List of Strings	defaults to none	Buildings that should automatically be built whenever a city is settled when starting a game in this era
startingObsoleteWonders	List of Strings	defaults to none	Wonders (and technically buildings) that should be impossible to built when starting a game in this era. Used in the base game to remove all wonders older than 2 era's

ModOptions.json

This file is a little different:

• Does not exist in Vanilla ruleset
• Is entirely optional but will be created after downloading a mod

The file can have the following attributes, including the values Unciv sets (no point in a mod author setting those):

Attribute	Type	Defaults	Notes
isBaseRuleset	Boolean	false	Differentiates mods that change the vanilla ruleset or replace it
maxXPfromBarbarians	Integer	30	...as the name says...
uniques	List	empty	Mod-wide specials, see here
techsToRemove	List	empty	List of Technologies to remove (isBaseRuleset=false only)
buildingsToRemove	List	empty	List of Buildings or Wonders to remove (isBaseRuleset=false only)
unitsToRemove	List	empty	List of Units to remove (isBaseRuleset=false only)
nationsToRemove	List	empty	List of Nations to remove (isBaseRuleset=false only)
lastUpdated	String	empty	Set automatically after download - Last repository update, not necessarily last content change
modUrl	String	empty	Set automatically after download - URL of repository
author	String	empty	Set automatically after download - Owner of repository
modSize	Integer	empty	Set automatically after download - kB in entire repository, not sum of default branch files

Civilopedia text

Any 'thing' defined in json and listed in the Civilopedia can supply extra text, specifically for the Civilopedia. This can be used to explain special considerations better when the automatically generated display is insufficient, or for 'flavour', background stories and the like. Such text can be formatted and linked to other Civilopedia entries, within limits.

An example of the format is:

        "civilopediaText": [
			{"text":"Ancient ruins provide a one-time random bonus when explored"},
			{"separator":true},
			{"text":"This line is red and links to the Scout including icons", "link":"Unit/Scout", "color":"red"},
			{"text":"A big fat header sporting a golden star", "header":1, "starred":true, "color":"#ffeb7f"},
		],

List of attributes - note not all combinations are valid:

attribute	type	description
text	String	Text to display.
link	String	Create link and icon, format: Category/Name or external link ('http://','https://','mailto:').
icon	String	Show icon without linking, format: Category/Name.
extraImage	String	Display an Image instead of text. Can be a path found in a texture atlas or or the name of a png or jpg in the ExtraImages folder.
imageSize	Float	Width in world units of the [extraImage], height is calculated preserving aspect ratio. Defaults to available width.
header	Integer	Header level. 1 means double text size and decreases from there.
size	Integer	Text size, default is 18. Use size or header but not both.
indent	Integer	Indent level. 0 means text will follow icons, 1 aligns to the right of all icons, each further step is 30 units.
padding	Float	Vertical padding between rows, defaults to 5 units.
color	String	Sets text color, accepts names or 6/3-digit web colors (e.g. #FFA040).
separator	Boolean	Renders a separator line instead of text. Can be combined only with color and size (line width, default 2).
starred	Boolean	Decorates text with a star icon - if set, it receives the color instead of the text.
centered	Boolean	Centers the line (and turns off automatic wrap).

The lines from json will 'surround' the automatically generated lines such that the latter are inserted just above the first json line carrying a link, if any. If no json lines have links, they will be inserted between the automatic title and the automatic info. This method may, however, change in the future.