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AI trait (Civ4)

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An AI trait is an aspect of an AI leader in Civilization IV that governs his or her behavior. Traits differ from one leader to another and should not be confused with leader traits.

Much of the information presented here comes from posts on the Civilization Modding Wiki and the CivFanatics forums.[1][2]

MechanicsEdit

AI traits are separated into several categories that are rated on varying scales. Some of the values can be difficult to interpret and offer guidelines for leader behavior rather than unbreakable rules. Some variance in leader behavior is also possible from one game to another.

There is one characteristic of computer-controlled leaders that the AI traits do not encompass: war planning habits. No leader will plan a war against a player with whom he or she is friendly, though some leaders will plan wars against players with whom they are pleased. Observations about these leaders can be found above their AI trait lists on the leader pages. Note that the traits listed on these pages are the default values, so they will not apply if "Random Personalities" is selected during game setup or a heavily modded version of the game is being played.

Meanings of the Traits Edit

  • Strategy indicates how the leader will play and attempt to win the game. Leaders may have either pure or mixed strategies; in the latter case, the higher number represents the leader's primary focus and the lower number represents the leader's secondary focus.
  • Favourite religion indicates which religion the leader will try to found.
  • Wonder Construct random indicates the percentage chance that the leader will try to build a wonder in one of his or her cities.
  • Base Attitude indicates the leader's initial attitude toward another player. Lower numbers represent greater hostility.
  • Base Peace Weight indicates how hard the leader will try to avoid getting involved in a war. Higher numbers represent greater pacifism.
  • Warmonger Respect indicates how the leader's attitude toward a player that he or she perceives as a warmonger will change.
  • Espionage Weight indicates how strongly the leader focuses on developing espionage and gathering intelligence on other players. Higher numbers represent a stronger focus on espionage.
  • Refuse To Talk War Threshold indicates how long the leader will be unwilling to negotiate peace in wartime.
  • No Tech Trade Threshold indicates when the leader will refuse further requests for technology trades.
  • Tech Trade Known Percent indicates what percentage of other players must research a technology before the leader will be willing to trade it.
  • Max Gold Trade Percent indicates the maximum percentage of acquired gold the leader is willing to trade.
  • Max War Rand indicates how likely the leader is to wage a total war (i.e. a war to eliminate another player). Lower numbers represent a greater likelihood of declaring war.
  • Raze City Prob indicates the percentage chance that the leader will raze a captured city.
  • Build Unit Prob indicates the percentage chance that the leader will train a military unit in one of his or her cities.
  • Close Borders Attitude Change indicates how the leader's attitude toward a player will change if their cultural borders overlap.
  • Same Religion Attitude Change Limit indicates how the leader's attitude toward a player will change if their state religions are the same.
  • Different Religion Attitude Change indicates how the leader's attitude toward a player will change if their state religions are different.
  • Favorite Civic Attitude Change Limit indicates how the leader's attitude toward a player who adopts his or her favorite civic will change.
  • Demand tribute will be refused when indicates when the leader will refuse a tribute demand from another player. Note that the leader is not guaranteed to give in to a demand if his or her attitude is better than the listed value, though the odds are much more favorable.
  • Request x will be refused when indicates when the leader will refuse a request from another player. Note that the leader is not guaranteed to accept a request if his or her attitude is better than the listed value, though the odds are much more favorable. If one of these elements is not listed on a given leader's page, that leader will always accept requests for it.
  • Max War Nearby Power Ratio indicates the maximum military strength of a nearby player against whom the leader will plan a total war (represented as a percentage of the leader's current military strength).
  • Max War Distant Power Ratio indicates the maximum military strength of a distant player against whom the leader will plan a total war (represented as a percentage of the leader's current military strength).
  • Max War Min Adjacent Land Percent indicates what amount of the leader's territory must be adjacent to another player's territory before he or she will plan a total war.
  • Limited War Rand indicates how likely the leader is to wage a limited war (i.e. a war to impede another player's victory progress). Lower numbers represent a greater likelihood of declaring war.
  • Limited War Power Ratio indicates the maximum military strength of a player against whom the leader will plan a limited war (represented as a percentage of the leader's current military strength).
  • Dogpile War Rand indicates how likely the leader is to join a war against a player on whom other players have declared war. Lower numbers represent a greater likelihood of declaring war.
  • Make Peace Rand indicates how willing the leader is to negotiate peace after declaring war. Lower numbers represent a greater likelihood of negotiating peace.
  • Demand Rebuked Sneak Prob indicates the percentage chance that the leader will plan a war against a player who refuses one of his or her demands.
  • Demand Rebuked War Prob indicates the percentage chance that the leader will declare war on a player who refuses one of his or her demands.
  • Base Attack Odds Change indicates how likely the leader is to think that his or her units can win a battle against an enemy unit. Higher numbers represent a greater likelihood of attacking nearby enemy units.
  • Worse Rank Difference Attitude Change indicates how the leader's attitude toward a player with a lower score will change.
  • Better Rank Difference Attitude Change indicates how the leader's attitude toward a player with a higher score will change.
  • Share War Attitude Change Limit indicates how much the leader's attitude toward a player can change if they fight against a common foe.
  • Vassal Power Modifier indicates how willing the leader is to capitulate with a request to become another player's vassal. Lower numbers represent a greater likelihood of capitulation.

ReferencesEdit

  1. http://modiki.civfanatics.com/index.php/Civ4LeaderHeadInfos
  2. http://forums.civfanatics.com/showthread.php?t=345910

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