modifiers Effect Types

Effect Types Reference

This document lists the available effect types for modifiers in Civilization VII.

Yield Effects

EFFECT_CITY_ADJUST_YIELD

Adjusts a city's yield output.

Argument	Type	Description
YieldType	TEXT	YIELD_FOOD, YIELD_PRODUCTION, etc.
Amount	INTEGER	Flat bonus
Percent	INTEGER	Percentage bonus
Tooltip	TEXT	Tooltip localization key

<Modifier id="EXAMPLE" collection="COLLECTION_PLAYER_CITIES" effect="EFFECT_CITY_ADJUST_YIELD">
    <Argument name="YieldType">YIELD_FOOD</Argument>
    <Argument name="Amount">2</Argument>
</Modifier>

EFFECT_PLOT_ADJUST_YIELD

Adjusts yield from a specific plot.

Argument	Type	Description
YieldType	TEXT	Yield type
Amount	INTEGER	Flat bonus

<Modifier id="EXAMPLE" collection="COLLECTION_PLAYER_PLOT_YIELDS" effect="EFFECT_PLOT_ADJUST_YIELD">
    <SubjectRequirements>
        <Requirement type="REQUIREMENT_PLOT_BIOME_TYPE_MATCHES">
            <Argument name="BiomeType">BIOME_DESERT</Argument>
        </Requirement>
    </SubjectRequirements>
    <Argument name="YieldType">YIELD_PRODUCTION</Argument>
    <Argument name="Amount">1</Argument>
</Modifier>

EFFECT_PLAYER_GRANT_YIELD

Grants a one-time yield to the player.

Argument	Type	Description
YieldType	TEXT	Yield type
Amount	INTEGER	Amount to grant

EFFECT_PLAYER_ADJUST_YIELD_PER_NUM_TRADE_ROUTES

Adjusts yield based on trade route count.

Argument	Type	Description
YieldType	TEXT	Yield type
Amount	INTEGER	Per trade route
Tooltip	TEXT	Tooltip key

EFFECT_CITY_ADJUST_WORKER_YIELD

Adjusts yield per worker in cities.

Argument	Type	Description
YieldType	TEXT	Yield type
Amount	INTEGER	Per worker
Tooltip	TEXT	Tooltip key

Production Effects

EFFECT_CITY_ADJUST_WONDER_PRODUCTION

Adjusts wonder production speed.

Argument	Type	Description
Percent	INTEGER	Percentage bonus

EFFECT_CITY_ADJUST_CONSTRUCTIBLE_PRODUCTION

Adjusts constructible production speed.

Argument	Type	Description
ConstructibleType	TEXT	Specific constructible (optional)
Percent	INTEGER	Percentage bonus

EFFECT_CITY_ADJUST_UNIT_PRODUCTION

Adjusts unit production speed.

Argument	Type	Description
UnitType	TEXT	Specific unit (optional)
Percent	INTEGER	Percentage bonus

Constructible Effects

EFFECT_PLAYER_ADJUST_CONSTRUCTIBLE_YIELD

Adjusts yields from constructibles.

Argument	Type	Description
YieldType	TEXT	Yield type
Amount	INTEGER	Bonus amount
ConstructibleType	TEXT	Specific type (optional)
Tag	TEXT	Constructible tag (optional)

<Modifier id="EXAMPLE" collection="COLLECTION_OWNER" effect="EFFECT_PLAYER_ADJUST_CONSTRUCTIBLE_YIELD">
    <Argument name="YieldType">YIELD_SCIENCE</Argument>
    <Argument name="Amount">1</Argument>
    <Argument name="Tag">SCIENCE</Argument>
</Modifier>

Unit Effects

EFFECT_UNIT_ADJUST_COMBAT_STRENGTH

Adjusts unit combat strength.

Argument	Type	Description
Amount	INTEGER	Strength modifier

EFFECT_ADJUST_UNIT_STRENGTH_MODIFIER

Adjusts unit strength as a percentage.

Argument	Type	Description
Amount	INTEGER	Percentage modifier

EFFECT_UNIT_ADJUST_HEAL_PER_TURN

Adjusts unit healing rate.

Argument	Type	Description
Amount	INTEGER	Healing per turn

EFFECT_UNIT_ADJUST_ABILITY

Grants an ability to units.

Argument	Type	Description
AbilityType	TEXT	Ability to grant

<Modifier id="EXAMPLE" collection="COLLECTION_PLAYER_UNITS" effect="EFFECT_UNIT_ADJUST_ABILITY">
    <Argument name="AbilityType">ABILITY_AMPHIBIOUS</Argument>
</Modifier>

EFFECT_ARMY_ADJUST_EXPERIENCE_RATE

Adjusts XP gain rate for armies.

Argument	Type	Description
Percent	INTEGER	XP rate modifier

EFFECT_ADJUST_UNIT_VALID_TERRAIN

Allows units to traverse terrain.

Argument	Type	Description
TerrainType	TEXT	Terrain type

EFFECT_ADJUST_UNIT_WATER_DAMAGE_PROTECTION

Protects units from water damage.

Argument	Type	Description
Amount	INTEGER	Protection level

Grant Effects

EFFECT_CITY_GRANT_UNIT

Grants a unit to a city.

Argument	Type	Description
UnitType	TEXT	Unit to grant

EFFECT_GRANT_GREAT_WORK

Grants a great work.

Argument	Type	Description
GreatWorkType	TEXT	Great work type

EFFECT_PLAYER_GRANT_PROGRESSION

Grants progression in a tech/civic tree.

Argument	Type	Description
ProgressionTreeType	TEXT	Tree type
Amount	INTEGER	Progress amount

EFFECT_GRANT_WALLS

Grants walls to cities.

Argument	Type	Description
WallLevel	INTEGER	Wall level

Diplomacy Effects

EFFECT_DIPLOMACY_ADJUST_DIPLOMATIC_ACTION_TYPE_EFFICIENCY

Adjusts diplomacy action efficiency.

Argument	Type	Description
ActionType	TEXT	Specific action (optional)
ActionGroupType	TEXT	Action group (optional)
Percent	INTEGER	Efficiency modifier

Scoring Effects

EFFECT_PLAYER_ADJUST_LEGACY_PATH_HIGH_YIELD_DISTRICT_SCORING

Adjusts scoring for high-yield districts.

EFFECT_PLAYER_ADJUST_LEGACY_PATH_GREAT_WORK_SCORING

Adjusts great work scoring.

EFFECT_PLAYER_ADJUST_LEGACY_PATH_RESOURCE_SCORING

Adjusts resource scoring.

EFFECT_PLAYER_ADJUST_LEGACY_PATH_SETTLEMENT_SCORING

Adjusts settlement scoring.

EFFECT_PLAYER_ADJUST_LEGACY_PATH_WONDER_SCORING

Adjusts wonder scoring.

Progression Effects

EFFECT_PLAYER_ADJUST_PROGRESSION_TREE_EFFICIENCY

Adjusts research/civic speed.

Argument	Type	Description
ProgressionTreeType	TEXT	Tree type
Percent	INTEGER	Speed modifier

Maintenance Effects

EFFECT_CITY_ADJUST_WORKER_MAINTENANCE_EFFICIENCY

Adjusts worker maintenance costs.

Argument	Type	Description
YieldType	TEXT	Yield type(s)
Percent	INTEGER	Efficiency bonus

Finding More Effects

To discover all available effects:

1. Search game files for EffectType="EFFECT_
2. Check gameplay-copy.sqlite in the debug folder
3. Look at *-gameeffects.xml files in modules/base-standard/data/

See Also

• Collection Types
• Requirement Types
• Modifier System Overview