Civ4TechInfos

The Civ4TechInfos file defines all of the information, basic and complex, about each of the game's technologies. Information in this file includes a tech's prerequisites, research cost, and benefits.

All tags must be opened and closed; the first is the "open", the second the "close" tag. If nothing goes inside a "list tag", then it should just be the opening tag with a "/" before the closing bracket. The following tables contain all available tags, as well as their purpose and accepted values.

This page is missing information. Do not remove this notice until it is complete.

Tags

Headers

These tags typically bracket other tags, sometimes the entire file, and are generally used to specify more than one piece of data.

Tag Name	Description
TechInfos	This begins and ends the file. Everything must go in between these two, or it will not work.
TechInfo	Encloses the entry for each technology.

Text

Tag Name	Description
Advisor	The category of this text, used in-game to provide suggestions of what to research. For example, Religion, Culture, Growth, or Military, among others.
Button	A comma separated field that lists four things: the path of the normal tech image, the path of the smaller image for this tech, and then x-y grid coordinates of the smaller image. The path of the normal image must be written.
Civilopedia	The text for a tech's civilopedia entry. It may reference a text file if it starts with TXT_KEY_.
Description	The in-game label for a tech. It may reference a text file if it starts with TXT_KEY_.
Era	The pre-defined era of technologies that this technology belongs to (e.g. Ancient, Classical, Medieval, etc.).
FirstFreeUnitClass	Provides the first player to research this technology a unit of the specified unit class.
Help	This defines the help tips given for this technology upon mouseover. It may reference a text file if it starts with TXT_KEY_.
Quote	The quote displayed in the civilopedia for this tech. It may reference a text file if it starts with TXT_KEY_.
Sound	Reference to the sound played when this tech is researched.
SoundMP	Reference to the sound played when this tech is researched in a multiplayer game.
Strategy	This contains the strategy text for a specific technology. It may reference a text file if it starts with TXT_KEY_.
Type	A unique internal label assigned to this tech. This is the first tag for each specific tech.

Integers

All of these tags have a numerical value. Though it sometimes can be negative, it usually is not.

Tag Name	Description
iAdvancedStartCost	Cost to start with tech via Advanced Start. All technologies have a value of 100.
iAdvancedStartCostIncrease	Additional cost per tech bought through Advanced Start. All technologies have a value of 0.
iAITradeModifier	A percentage value, this is the modifier used by AI leaders in trade negotiations. Some techs, like Fiber Optics, have values at 10.
iAIWeight	The base AI point value of this tech, used for AI decision-making.
iAsset	The incremental modifier used to increase a player's score.
iCost	The default research cost, before modifiers like difficulty level are applied.
iFeatureProductionModifier	Optional. A percentage value, it modifies the production output of some worker actions, liking chopping forests.
iFirstFreeTechs	The number of free techs for the first leader to research this tech.
iGridX	The x-coordinate, or column, to place the technology item in the tech tree.
iGridY	The y-coordinate, or row, to place the technology item in the tech tree.
iHappiness	Incremental modifier to raise the happiness in each city by the specified value.
iHealth	Incremental modifier to raise the health in each city by the specified value.
iPower	Incremental modifier to raise the player's power rating, as viewed by the AI, by the specified value.
iTradeRoutes	Increases the number of trade routes per city by the specified amount.
iWorkerSpeedModifier	A percentage value, this modifies the speed of the player's workers. For example, Steam Power has a value of 50 (meaning a +50% increase).

Boolean

All of these can either be 1 (on, or true) or 0 (off, or false). Be careful, as you can wind up with a double-negative, which the game will interpret as "True".

Tag Name	Description
bBridgeBuilding	Enables bridge building, or movement via road over a river without penalty.
bDefensivePactTrading	Enables trading of defensive pacts with other civilizations.
bDisable	If set as 1, prevents this tech from being researched.
bExtraWaterSeeFrom	If true, increases naval units' line of sight by 1 tile.
bGoldTrading	Allows gold trading in diplomacy.
bGoodyTech	Allows this tech to be received from a goody hut.
bIgnoreIrrigation	Allows farms to be built regardless of nearby fresh water.
bIrrigation	Allows for "chain irrigation", or irrigation on tiles not directly located next to fresh water.
bMapCentering	If true, centers the world map for the player.
bMapTrading	Allows for map trading in diplomacy.
bMapVisible	Reveals the entire world map, even unresearched parts.
bOpenBordersTrading	Allows for open borders trading in diplomacy.
bPermanentAllianceTrading	Allows for negotiation of permanent alliances in diplomacy.
bRepeat	Allows this technology to be researched multiple times (for example, Future Techs have this set at 1).
bRiverTrade	Allows trade routes to form along rivers (Sailing allows this in the standard game).
bTechTrading	Allows the player to trade technologies in-game.
bTrade	Allows the player to trade this technology in particular in diplomacy.
bVassalTrade	Allows the negotiation of vassal agreements, as well as capitulation during war.
bWaterWork	Allows the player to assign citizens to work coast or ocean tiles.

Lists (Multi-line)

All List tags consist of an opening/closing tag, which is shown here, and then each entry within it is another tag with the same name as the parent tag, minus the "s" (i.e. singular, rather than plural).

Tag Name	Description
AndPreReqs	This lists all technologies that must be researched before this technology. In-game, it creates an icon in the top right of the tech's button on the tech tree.
DomainExtraMoves	Gives a specified number of movement points to units of a certain type. For example, Refrigeration gives all naval units +1 movement.
CommerceFlexible	Allows for the adjustment of the specified commerce slider (science, culture, etc.).
Flavors	Modifies AI point weighting based on an assigned flavor (potential flavors include Production, Science, Growth, and Military, among others).
OrPreReqs	Used to draw the connecting lines on the tech tree, this lists all of the "OR" prerequisites: that is, you must discover at least one of these technologies before you can research the tech in question.
SpecialBuilding	Unknown. This is defined in the schema file, but not listed in the Civ4TechInfos file itself.
TerrainTrades	Allows trade across the specified terrain types. For example, Sailing allows trade on coastal tiles.

Example

In the following example of code, please note that there is a specific order of all of the tags. You must list the tags in this order for the game to properly interpret your file.

<TechInfos>
 <TechInfo>
  <Type>TECH_MYSTICISM</Type>
  <Description>TXT_KEY_TECH_MYSTICISM</Description>
  <Civilopedia>TXT_KEY_TECH_MYSTICISM_PEDIA</Civilopedia>
  <Help/>
  <Strategy>TXT_KEY_TECH_MYSTICISM_STRATEGY</Strategy>
  <Advisor>ADVISOR_RELIGION</Advisor>
  <iAIWeight>0</iAIWeight>
  <iAITradeModifier>0</iAITradeModifier>
  <iCost>50</iCost>
  <iAdvancedStartCost>100</iAdvancedStartCost>
  <iAdvancedStartCostIncrease>0</iAdvancedStartCostIncrease>
  <Era>ERA_ANCIENT</Era>
  <FirstFreeUnitClass>NONE</FirstFreeUnitClass>
  <iFeatureProductionModifier>0</iFeatureProductionModifier>
  <iWorkerSpeedModifier>0</iWorkerSpeedModifier>
  <iTradeRoutes>0</iTradeRoutes>
  <iHealth>0</iHealth>
  <iHappiness>0</iHappiness>
  <iFirstFreeTechs>0</iFirstFreeTechs>
  <iAsset>8</iAsset>
  <iPower>0</iPower>
  <bRepeat>0</bRepeat>
  <bTrade>1</bTrade>
  <bDisable>0</bDisable>
  <bGoodyTech>1</bGoodyTech>
  <bExtraWaterSeeFrom>0</bExtraWaterSeeFrom>
  <bMapCentering>0</bMapCentering>
  <bMapVisible>0</bMapVisible>
  <bMapTrading>0</bMapTrading>
  <bTechTrading>0</bTechTrading>
  <bGoldTrading>0</bGoldTrading>
  <bOpenBordersTrading>0</bOpenBordersTrading>
  <bDefensivePactTrading>0</bDefensivePactTrading>
  <bPermanentAllianceTrading>0</bPermanentAllianceTrading>
  <bVassalTrading>0</bVassalTrading>
  <bBridgeBuilding>0</bBridgeBuilding>
  <bIrrigation>0</bIrrigation>
  <bIgnoreIrrigation>0</bIgnoreIrrigation>
  <bWaterWork>0</bWaterWork>
  <iGridX>1</iGridX>
  <iGridY>11</iGridY>
  <DomainExtraMoves/>
  <CommerceFlexible/>
  <TerrainTrades/>
  <bRiverTrade>0</bRiverTrade>
  <Flavors>
   <Flavor>
    <FlavorType>FLAVOR_RELIGION</FlavorType>
    <iFlavor>9</iFlavor>
   </Flavor>
   <Flavor>
    <FlavorType>FLAVOR_GOLD</FlavorType>
    <iFlavor>1</iFlavor>
   </Flavor>
   <Flavor>
    <FlavorType>FLAVOR_CULTURE</FlavorType>
    <iFlavor>8</iFlavor>
   </Flavor>
   <Flavor>
    <FlavorType>FLAVOR_GROWTH</FlavorType>
    <iFlavor>2</iFlavor>
   </Flavor>
  </Flavors>
  <OrPreReqs/>
  <AndPreReqs/>
  <Quote>TXT_KEY_TECH_MYSTICISM_QUOTE</Quote>
  <Sound>AS2D_TECH_MYSTICISM</Sound>
  <SoundMP>AS2D_TECH_MP_MYSTICISM</SoundMP>
  <Button>,Art/Interface/Buttons/TechTree/Mysticism.dds,Art/Interface/Buttons/TechTree_Atlas.dds,4,11</Button>
 </TechInfo>
</TechInfos>

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