Modes
Apocalypse
Heroes & Legends
Industries, Monopolies & Corporations
Secret Societies
Tech and Civic Shuffle Mode
Dramatic Ages
Zombie Defense
Barbarian Clans
Flatland Clan
Woodland Clan
Hills Clan
Rover Clan
Jungle Clan
Chariot Clan
Seafaring Clan
Gathering Storm
Consumable Resources
Power
Environmental Effects
Global Temperature
Grievances
World Congress
Diplomatic Victory
Rise and Fall
Historic Moments
Golden and Dark Ages
Dedications
Loyalty
Governors
Alliances
Emergencies
Free Cities
Cities
Introduction
How to Build Cities
Where to Construct Cities
Growth
Food
Housing
Water
Districts
Neighborhoods and Appeal
Buildings
Wonders
The Palace
Citizens
Happiness
Amenity Sources
Specialists
Combat
Introduction
Declaring War
War Weariness
Ending a War
Unit Combat Statistics
Line of Sight
Combat Bonuses
Experience and Promotions
City Combat
Conquering a City
Formations
Pillaging
Faith and Religion
Introduction
Earning Faith
Pantheons
Great Prophets
Founding Your Religion
Religious Units and Pressure
Theological Combat
Diplomacy
Introduction
Diplomacy with Civilizations
Diplomatic Relationships
Trade, Demand, and Discuss
Delegations and Embassies
Open Borders
Defensive Pact
Joint War
Territory
Casus Belli
Agendas
Diplomatic Visibility and Gossip
Spies and Espionage
Tourism
Introduction
Great Works, Relics, and Artifacts
Themes and Theming
Seaside Resorts
National Parks
Cultural Dominance
Environmental Effects
Volcanoes
Volcanoes are commonly found near continent borders. Volcanoes have three states: dormant, active and erupting. Dormant Volcanoes are identical to mountain tiles. A dormant Volcano may become active. Once active, they begin to glow from within, and billowing smoke from the top hints at what's to come. Active Volcanoes will eventually erupt and damage the surrounding tiles and any features or improvements on those tiles.
Improvements affected by a Volcano erupting can be pillaged or removed. Garrisons and fortifications may take damage. City Centers near an erupting Volcano may suffer population loss in that city. All is not lost, however. Each tile effected by volcanic eruptions has a chance to have an increased
Food and 
Production yield after the eruption. Wonders are not affected by eruptions.
Improvements affected by a Volcano erupting can be pillaged or removed. Garrisons and fortifications may take damage. City Centers near an erupting Volcano may suffer population loss in that city. All is not lost, however. Each tile effected by volcanic eruptions has a chance to have an increased
Food and Production yield after the eruption. Wonders are not affected by eruptions.Geothermal Fissures
Geothermal Fissures are a non-removable terrain feature which add +1 
Science to the tile. The standard Aqueduct and Roman Bath grant +1 
Amenity when placed adjacent to a Geothermal Fissure. The Hungarian Thermal Bath grant +2 Amenities and +3 
Tourism. The Geothermal Power Plant improvement must be constructed over a Geothermal Fissure.
Science to the tile. The standard Aqueduct and Roman Bath grant +1 Amenity when placed adjacent to a Geothermal Fissure. The Hungarian Thermal Bath grant +2 Amenities and +3 Tourism. The Geothermal Power Plant improvement must be constructed over a Geothermal Fissure.Floods
Flooding may occur along any tile adjacent to a river. Floods have the chance to pillage or remove tile improvements, pillage buildings in districts, reduce city center population, and damage units or fortifications. Wonders are not affected by Floods. Floods may vary in severity, with more severe floods (like the 1000-year-Flood) affecting greater areas. You can prevent flooding by building a Dam along the river. Only one Dam may be constructed along a river. The Great Bath wonder prevents damage caused by Floods. After a Flood passes, there is a chance that affected tiles will have an improved Food or Production yield.
Food or Production yield.Storms
Storms have the potential to appear anywhere on the map and will persist for 3 turns. The stages of storms are Entry, Movement, and Dissipation. The type of storms that occur are dependent on the surrounding terrain. All storms have the chance to pillage or remove tile improvements, pillage buildings in districts, reduce city center population and damage units. Storm effects vary on their type:
Blizzards can occur only in Snow or Tundra tiles. They range from significant (7 tiles) to crippling (19 tiles). After a Blizzard passes, there is a chance that affected tiles will have an improved Food yield.
Dust Storms can only occur in Desert tiles. They range from gradient (3 tiles) to haboob (7 tiles). After a Dust Storm passes, there is a chance that affected tiles will have an improved Food or Production yield.
Tornados only occur in Plains and Grassland tiles. They range from family (1 tile) to outbreak (3 tiles).
Hurricanes only occur in Ocean tiles. They range from Category 4 (7 tiles) to Category 5 (19 tiles). After a Hurricane passes, there is a chance that affected tiles will have an improved Food or Production yield.
Blizzards can occur only in Snow or Tundra tiles. They range from significant (7 tiles) to crippling (19 tiles). After a Blizzard passes, there is a chance that affected tiles will have an improved
Food yield.Dust Storms can only occur in Desert tiles. They range from gradient (3 tiles) to haboob (7 tiles). After a Dust Storm passes, there is a chance that affected tiles will have an improved
Food or Production yield.Tornados only occur in Plains and Grassland tiles. They range from family (1 tile) to outbreak (3 tiles).
Hurricanes only occur in Ocean tiles. They range from Category 4 (7 tiles) to Category 5 (19 tiles). After a Hurricane passes, there is a chance that affected tiles will have an improved
Food or Production yield.Climate Change
As the game progresses through the eras, Civilizations will discover Power and Consumable Resources. Using Consumable Resources to provide Power will produce CO2. As more CO2 is produced, polar ice will begin to melt causing the sea levels to rise.
Coastal terrain is displayed as one of four levels:
1 meter
2 meters
3 meters
Not affected by coastal flooding.
Each level of global CO2 that is reached raises the sea level by .5 meters. This means at Level 2 the 1 meter coastal terrain will be flooded. If a high enough level is reached 1 meter and 2 meter tiles will become submerged and become coastal water tiles. This may result in the destruction of improvements and districts on flooded tiles, and the loss of population in City Centers.
As the global CO2 increases, the chance of Storms, River Flooding, and Drought occurring increases. Also, these events are likely to be more severe than at lower CO2 levels. At the highest levels of Climate Change desertification begins to occur: Storms and Floods no longer leave behind yields and earlier fertility gains (from Volcanoes, Floods or Storms) can be lost to Storms and Droughts.
Coastal terrain is displayed as one of four levels:
1 meter2 meters3 metersNot affected by coastal flooding.Each level of global CO2 that is reached raises the sea level by .5 meters. This means at Level 2 the 1 meter coastal terrain will be flooded. If a high enough level is reached 1 meter and 2 meter tiles will become submerged and become coastal water tiles. This may result in the destruction of improvements and districts on flooded tiles, and the loss of population in City Centers.
As the global CO2 increases, the chance of Storms, River Flooding, and Drought occurring increases. Also, these events are likely to be more severe than at lower CO2 levels. At the highest levels of Climate Change desertification begins to occur: Storms and Floods no longer leave behind yields and earlier fertility gains (from Volcanoes, Floods or Storms) can be lost to Storms and Droughts.
Nuclear Accidents
Although Nuclear Power Plants can provide your cities with 
Power without causing significant global warming, there is a chance that a Nuclear Accident may occur as the Power Plant ages.
Once a Nuclear Power Plant is built, it will provide Power without problems for a number of turns. As it ages, the chances that a Nuclear Accident will occur increase. You can protect yourself from this by performing maintenance on the Nuclear Power Plant as a project in the home city.
There are three levels of severity for Nuclear Accidents in increasing order of severity: Radioactive Steam Venting, Radiation Leak, and Nuclear Meltdown. When these occur, radiation leaks and tiles are subject to fallout, just as if a nuclear weapon had detonated. There is also a chance that improvements, buildings, units, and population may be damaged.
Power without causing significant global warming, there is a chance that a Nuclear Accident may occur as the Power Plant ages.Once a Nuclear Power Plant is built, it will provide
Power without problems for a number of turns. As it ages, the chances that a Nuclear Accident will occur increase. You can protect yourself from this by performing maintenance on the Nuclear Power Plant as a project in the home city.There are three levels of severity for Nuclear Accidents in increasing order of severity: Radioactive Steam Venting, Radiation Leak, and Nuclear Meltdown. When these occur, radiation leaks and tiles are subject to fallout, just as if a nuclear weapon had detonated. There is also a chance that improvements, buildings, units, and population may be damaged.
Droughts
Droughts are prolonged period of reduced precipitation, where agriculture becomes more difficult or impossible, resulting in a loss of Food.
Droughts can occur in Grassland or Plains areas without features like trees, hills, or nearby rivers or coasts. The Drought will be centered on a Grassland or Plains tile, with at least four Grassland or Plains tiles adjacent that do not have any other feature. A Drought may extend to additional tiles as well, potentially affecting huge regions. Droughts become more common as global temperature increases.
A Drought will reduce the Food yield of a tile by 1. In addition, any Farms, Camps, Plantations, Pastures, and the Mekewap, Outback Station, and Cahokia Mound improvements built in the affected areas will be pillaged. There is a chance that the most severe Droughts will entirely remove these improvements!
A city with an Aqueduct, Dam, Bath District, or Stepwell improvement will not suffer the -1 Food yield during a Drought, but will still have Improvements pillaged by the Drought.
A Major Drought lasts for 5 turns, and an Extreme Drought for 10. Improvements cannot be rebuilt or replaced while the Drought is active. Droughts do not offer any benefits after they have ended.
Food.Droughts can occur in Grassland or Plains areas without features like trees, hills, or nearby rivers or coasts. The Drought will be centered on a Grassland or Plains tile, with at least four Grassland or Plains tiles adjacent that do not have any other feature. A Drought may extend to additional tiles as well, potentially affecting huge regions. Droughts become more common as global temperature increases.
A Drought will reduce the
Food yield of a tile by 1. In addition, any Farms, Camps, Plantations, Pastures, and the Mekewap, Outback Station, and Cahokia Mound improvements built in the affected areas will be pillaged. There is a chance that the most severe Droughts will entirely remove these improvements!A city with an Aqueduct, Dam, Bath District, or Stepwell improvement will not suffer the -1
Food yield during a Drought, but will still have Improvements pillaged by the Drought. A Major Drought lasts for 5 turns, and an Extreme Drought for 10. Improvements cannot be rebuilt or replaced while the Drought is active. Droughts do not offer any benefits after they have ended.
Forest Fires
Any tile with Woods or Rainforest can catch ablaze. The fire burns hot for three turns, destroying improvements on the tile, reducing the owning city's population, and damaging units. On the second and third turns, this fire might spread to any adjacent Woods or Rainforest tiles.
Once the fire has burned out, the Woods or Rainforest is replaced with a Burnt variant, boosting the tile's Food yield. Over the next 3 turns, it regrows until it returns to its normal state, at which point it also boosts the tile's Production yield.
Once the fire has burned out, the Woods or Rainforest is replaced with a Burnt variant, boosting the tile's
Food yield. Over the next 3 turns, it regrows until it returns to its normal state, at which point it also boosts the tile's Production yield.Meteor Showers
Meteors may shower anywhere on land in the space between player territories, and leave behind a Meteor Site. Any unit can collect this Meteor Site, gathering the easily-accessible advanced ores in the fallen rocks, granting them a free Heavy Cavalry unit in their nearest city. This unit has no resource maintenance cost.
Solar Flares
Solar Flares affect the entire map. The turn that they trigger, they destroy Power Plant buildings, and may damage advanced units and improvements, Power related buildings, Campus Districts, Industrial Zone Districts, and Spaceport Districts.
Power Plant buildings, and may damage advanced units and improvements, Power related buildings, Campus Districts, Industrial Zone Districts, and Spaceport Districts.Comet Strikes
Comet Strikes affect four adjacent tiles, or target city centers, wiping out anything in their way and making the tile impassable.
Volcanoes
Volcanoes are commonly found near continent borders. Volcanoes have three states: dormant, active and erupting. Dormant Volcanoes are identical to mountain tiles. A dormant Volcano may become active. Once active, they begin to glow from within, and billowing smoke from the top hints at what's to come. Active Volcanoes will eventually erupt and damage the surrounding tiles and any features or improvements on those tiles.
Improvements affected by a Volcano erupting can be pillaged or removed. Garrisons and fortifications may take damage. City Centers near an erupting Volcano may suffer population loss in that city. All is not lost, however. Each tile effected by volcanic eruptions has a chance to have an increased Food and Production yield after the eruption. Wonders are not affected by eruptions.
Improvements affected by a Volcano erupting can be pillaged or removed. Garrisons and fortifications may take damage. City Centers near an erupting Volcano may suffer population loss in that city. All is not lost, however. Each tile effected by volcanic eruptions has a chance to have an increased
Food and Production yield after the eruption. Wonders are not affected by eruptions.Geothermal Fissures
Geothermal Fissures are a non-removable terrain feature which add +1 Science to the tile. The standard Aqueduct and Roman Bath grant +1 Amenity when placed adjacent to a Geothermal Fissure. The Hungarian Thermal Bath grant +2 Amenities and +3 Tourism. The Geothermal Power Plant improvement must be constructed over a Geothermal Fissure.
Science to the tile. The standard Aqueduct and Roman Bath grant +1 Amenity when placed adjacent to a Geothermal Fissure. The Hungarian Thermal Bath grant +2 Amenities and +3 Tourism. The Geothermal Power Plant improvement must be constructed over a Geothermal Fissure.Floods
Flooding may occur along any tile adjacent to a river. Floods have the chance to pillage or remove tile improvements, pillage buildings in districts, reduce city center population, and damage units or fortifications. Wonders are not affected by Floods. Floods may vary in severity, with more severe floods (like the 1000-year-Flood) affecting greater areas. You can prevent flooding by building a Dam along the river. Only one Dam may be constructed along a river. The Great Bath wonder prevents damage caused by Floods. After a Flood passes, there is a chance that affected tiles will have an improved Food or Production yield.
Food or Production yield.Storms
Storms have the potential to appear anywhere on the map and will persist for 3 turns. The stages of storms are Entry, Movement, and Dissipation. The type of storms that occur are dependent on the surrounding terrain. All storms have the chance to pillage or remove tile improvements, pillage buildings in districts, reduce city center population and damage units. Storm effects vary on their type:
Blizzards can occur only in Snow or Tundra tiles. They range from significant (7 tiles) to crippling (19 tiles). After a Blizzard passes, there is a chance that affected tiles will have an improved Food yield.
Dust Storms can only occur in Desert tiles. They range from gradient (3 tiles) to haboob (7 tiles). After a Dust Storm passes, there is a chance that affected tiles will have an improved Food or Production yield.
Tornados only occur in Plains and Grassland tiles. They range from family (1 tile) to outbreak (3 tiles).
Hurricanes only occur in Ocean tiles. They range from Category 4 (7 tiles) to Category 5 (19 tiles). After a Hurricane passes, there is a chance that affected tiles will have an improved Food or Production yield.
Blizzards can occur only in Snow or Tundra tiles. They range from significant (7 tiles) to crippling (19 tiles). After a Blizzard passes, there is a chance that affected tiles will have an improved
Food yield.Dust Storms can only occur in Desert tiles. They range from gradient (3 tiles) to haboob (7 tiles). After a Dust Storm passes, there is a chance that affected tiles will have an improved
Food or Production yield.Tornados only occur in Plains and Grassland tiles. They range from family (1 tile) to outbreak (3 tiles).
Hurricanes only occur in Ocean tiles. They range from Category 4 (7 tiles) to Category 5 (19 tiles). After a Hurricane passes, there is a chance that affected tiles will have an improved
Food or Production yield.Climate Change
As the game progresses through the eras, Civilizations will discover Power and Consumable Resources. Using Consumable Resources to provide Power will produce CO2. As more CO2 is produced, polar ice will begin to melt causing the sea levels to rise.
Coastal terrain is displayed as one of four levels:
1 meter
2 meters
3 meters
Not affected by coastal flooding.
Each level of global CO2 that is reached raises the sea level by .5 meters. This means at Level 2 the 1 meter coastal terrain will be flooded. If a high enough level is reached 1 meter and 2 meter tiles will become submerged and become coastal water tiles. This may result in the destruction of improvements and districts on flooded tiles, and the loss of population in City Centers.
As the global CO2 increases, the chance of Storms, River Flooding, and Drought occurring increases. Also, these events are likely to be more severe than at lower CO2 levels. At the highest levels of Climate Change desertification begins to occur: Storms and Floods no longer leave behind yields and earlier fertility gains (from Volcanoes, Floods or Storms) can be lost to Storms and Droughts.
Coastal terrain is displayed as one of four levels:
1 meter2 meters3 metersNot affected by coastal flooding.Each level of global CO2 that is reached raises the sea level by .5 meters. This means at Level 2 the 1 meter coastal terrain will be flooded. If a high enough level is reached 1 meter and 2 meter tiles will become submerged and become coastal water tiles. This may result in the destruction of improvements and districts on flooded tiles, and the loss of population in City Centers.
As the global CO2 increases, the chance of Storms, River Flooding, and Drought occurring increases. Also, these events are likely to be more severe than at lower CO2 levels. At the highest levels of Climate Change desertification begins to occur: Storms and Floods no longer leave behind yields and earlier fertility gains (from Volcanoes, Floods or Storms) can be lost to Storms and Droughts.
Nuclear Accidents
Although Nuclear Power Plants can provide your cities with Power without causing significant global warming, there is a chance that a Nuclear Accident may occur as the Power Plant ages.
Once a Nuclear Power Plant is built, it will provide Power without problems for a number of turns. As it ages, the chances that a Nuclear Accident will occur increase. You can protect yourself from this by performing maintenance on the Nuclear Power Plant as a project in the home city.
There are three levels of severity for Nuclear Accidents in increasing order of severity: Radioactive Steam Venting, Radiation Leak, and Nuclear Meltdown. When these occur, radiation leaks and tiles are subject to fallout, just as if a nuclear weapon had detonated. There is also a chance that improvements, buildings, units, and population may be damaged.
Power without causing significant global warming, there is a chance that a Nuclear Accident may occur as the Power Plant ages.Once a Nuclear Power Plant is built, it will provide
Power without problems for a number of turns. As it ages, the chances that a Nuclear Accident will occur increase. You can protect yourself from this by performing maintenance on the Nuclear Power Plant as a project in the home city.There are three levels of severity for Nuclear Accidents in increasing order of severity: Radioactive Steam Venting, Radiation Leak, and Nuclear Meltdown. When these occur, radiation leaks and tiles are subject to fallout, just as if a nuclear weapon had detonated. There is also a chance that improvements, buildings, units, and population may be damaged.
Droughts
Droughts are prolonged period of reduced precipitation, where agriculture becomes more difficult or impossible, resulting in a loss of Food.
Droughts can occur in Grassland or Plains areas without features like trees, hills, or nearby rivers or coasts. The Drought will be centered on a Grassland or Plains tile, with at least four Grassland or Plains tiles adjacent that do not have any other feature. A Drought may extend to additional tiles as well, potentially affecting huge regions. Droughts become more common as global temperature increases.
A Drought will reduce the Food yield of a tile by 1. In addition, any Farms, Camps, Plantations, Pastures, and the Mekewap, Outback Station, and Cahokia Mound improvements built in the affected areas will be pillaged. There is a chance that the most severe Droughts will entirely remove these improvements!
A city with an Aqueduct, Dam, Bath District, or Stepwell improvement will not suffer the -1 Food yield during a Drought, but will still have Improvements pillaged by the Drought.
A Major Drought lasts for 5 turns, and an Extreme Drought for 10. Improvements cannot be rebuilt or replaced while the Drought is active. Droughts do not offer any benefits after they have ended.
Food.Droughts can occur in Grassland or Plains areas without features like trees, hills, or nearby rivers or coasts. The Drought will be centered on a Grassland or Plains tile, with at least four Grassland or Plains tiles adjacent that do not have any other feature. A Drought may extend to additional tiles as well, potentially affecting huge regions. Droughts become more common as global temperature increases.
A Drought will reduce the
Food yield of a tile by 1. In addition, any Farms, Camps, Plantations, Pastures, and the Mekewap, Outback Station, and Cahokia Mound improvements built in the affected areas will be pillaged. There is a chance that the most severe Droughts will entirely remove these improvements!A city with an Aqueduct, Dam, Bath District, or Stepwell improvement will not suffer the -1
Food yield during a Drought, but will still have Improvements pillaged by the Drought. A Major Drought lasts for 5 turns, and an Extreme Drought for 10. Improvements cannot be rebuilt or replaced while the Drought is active. Droughts do not offer any benefits after they have ended.
Forest Fires
Any tile with Woods or Rainforest can catch ablaze. The fire burns hot for three turns, destroying improvements on the tile, reducing the owning city's population, and damaging units. On the second and third turns, this fire might spread to any adjacent Woods or Rainforest tiles.
Once the fire has burned out, the Woods or Rainforest is replaced with a Burnt variant, boosting the tile's Food yield. Over the next 3 turns, it regrows until it returns to its normal state, at which point it also boosts the tile's Production yield.
Once the fire has burned out, the Woods or Rainforest is replaced with a Burnt variant, boosting the tile's
Food yield. Over the next 3 turns, it regrows until it returns to its normal state, at which point it also boosts the tile's Production yield.Meteor Showers
Meteors may shower anywhere on land in the space between player territories, and leave behind a Meteor Site. Any unit can collect this Meteor Site, gathering the easily-accessible advanced ores in the fallen rocks, granting them a free Heavy Cavalry unit in their nearest city. This unit has no resource maintenance cost.
Solar Flares
Solar Flares affect the entire map. The turn that they trigger, they destroy Power Plant buildings, and may damage advanced units and improvements, Power related buildings, Campus Districts, Industrial Zone Districts, and Spaceport Districts.
Power Plant buildings, and may damage advanced units and improvements, Power related buildings, Campus Districts, Industrial Zone Districts, and Spaceport Districts.Comet Strikes
Comet Strikes affect four adjacent tiles, or target city centers, wiping out anything in their way and making the tile impassable.
