Actions

Respond

Can only be used reactively.
Used on threatened cities to block the Capture attempt.
Cost is similar to the cost of the Capture, but without the Devices requirement or any adjacency effect.
If two cities are threatened at the same time, only one can be saved.
Also used to remove the effects of certain random events.

Used to exchange resources with cities that belong to other factions.
Each city makes a distinct offer. Offers vary in their profitability.
When an offer is taken, a new one is generated. In addition, offers slowly change over time.
You are trading with the civilian population, so what you get does not come out of the owner's stockpile.
The owner faction collects 25% of what you pay, as a tariff.
Cost depends on the city's total population.
Improves relations with the owner faction.

Used to acquire Labour, Violence, or Depth from any city you control.
Each city has a fixed preference for the input resource.
Cost and gain depend on the city's total population.
Cost is modified by prosperity, while gain is not.
Once you recruit from a city, it goes on cooldown for a duration that depends on current control.

Used to raid adjacent cities for resources, and to generate Fear.
The choice of which resource is stolen changes after each raid.
Cost depends on resident cultures.
The amount stolen is modified by prosperity.
Reduces the prosperity of the target city.
Harms relations with the owner faction.
Stolen resources come from the city's civilian population, and not the owner's stockpile.

Used to attempt to gain control of a city by force.
The effect is not instant: the city is considered threatened until the start of your next turn.
On their turn, the owner can block the attempt using the Respond action.
Cost depends on resident cultures, and also on which side controls more adjacent cities.
Regardless of whether the attempt succeeds or fails, it harms relations with the owner.
Capturing a faction's capital destroys it: any other cities they control become independent, and relics are transferred to you.

Used to gain control of a city through diplomatic means.
The effect is immediate, and cannot be blocked.
Cost depends on resident cultures, and on how remote the city is from its owner's capital.
Cannot target faction capitals.
Harms relations with the owner faction.

Used to build or restore landmarks.
Landmarks are unique in their effect, fixed in their location, and not available in all cities.
Once a landmark has been completed, it gives its effect to whoever controls it.
There is an information map to see the locations of all landmarks.
Cities with landmarks show a progress indicator in the main map view.

Used to discover buried relics and resources.
How much of what resources can be found is not random, but is also not openly advertised.
To help identify good places to excavate, the player's excavation statistics are tracked under each city's details.
The percentage shown under a city is the probability of finding a relic.
Relics are unique, discovered at random, and give their benefit to the faction that holds them.
Excavations increase excavation depth, which improves the odds of finding a relic, raises the cost, but does not improve resource yields.