Settlement Technology / Science in Sundered Cosmos | World Anvil
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Settlement

Adventures have to start somewhere, and everyone needs some semblance of a home. Settlements are where characters can rest, recharge, retrain, and dedicate themselves to other downtime activities, all in relative peace. But settlements can also hold their own intrigues and dangers, providing adventure opportunities of their own.

Utility

Settlements in a Game

Given the variety of roles a settlement can play in an adventure, a Game Master should have a firm understanding of how they work in the game and how to best use them. 
Settlement Adventures
A settlement’s greater population density allows for a number of adventure styles and elements that aren’t as common beyond the city walls. Social encounters are one of the most common interactions within a settlement, starting with the guards at the city gates all the way to an audience with the queen. 
Settlement Abilities

Manufacturing

Urban Environment

Urban environments include open city spaces as well as buildings. The building information in this section also applies to ruins and constructed dungeons. Depending on their construction and location, cities might be vulnerable to many sorts of disasters, especially fires and floods.
Crowds
Crowded thoroughfares and similar areas are difficult terrains, or greater difficult terrain if an area is truly packed with people. You might allow a character to get a crowd to part using Diplomacy, Intimidation, or Performance. A crowd exposed to an obvious danger, like a fire or a rampaging monster, attempts to move away from the danger as quickly as possible, but it is slowed by its own mass. A fleeing crowd typically moves at the Speed of an average member each round (usually 25 feet), potentially trampling or leaving behind slower-moving members of the crowd.
Doors
Opening an unlocked door requires an Interact action (or more than one for a particularly complicated or large door). Stuck doors must be Forced Open, and locked ones require a character to Pick the Lock or Force them Open.
Floors
Wooden floors are easy to walk on, as are flagstone floors made of fitted stones. However, floors of worn flagstone often contain areas of uneven ground.
Gates
Walled settlements often have gates that the city can close for defense or open to allow travel. A typical gate consists of one portcullis at each end of a gatehouse, with murder holes in between or other protected spots from which guards can attack foes.
Guards
Most settlements of significant size have guards working in shifts to protect the settlement at all hours, patrolling the streets and guarding various posts. The size of this force varies from one guard for every 1,000 residents to a force 10 times this number.
Portcullises
A portcullis is a wooden or iron grate that descends to seal off a gate or corridor. Most are raised on ropes or chains operated by a winch, and they have locking mechanisms that keep them from being lifted easily.
Rooftops
Rooftops make for memorable ambushes, chase scenes, infiltrations, and running fights. Flat roofs are easy to move across, but they’re rare in any settlement that receives significant snowfall, since heavy buildups of snow can collapse a roof. Angled roofs are uneven ground, or inclines if they’re especially steep. The peak of an angled roof is a narrow surface.   Hurdling from roof to roof often requires a Long Jump, though some buildings are close enough to Leap between. A High Jump might be necessary to reach a higher roof, or a Leap followed by Grabbing an Edge and Climbing up.
Sewers
Sewers are generally 10 feet or more below street level and are equipped with ladders or other means to ascend and descend. Raised paths along the walls allow sewer workers access, while channels in the center carry the waste itself. Less sophisticated sewers, or sections those workers don’t usually access, might require wading through diseaseridden waste. Sewers can be accessed through sewer grates, which usually require 2 or more Interact actions to open.
Sewer Gas
Sewer gas often contains pockets of highly flammable gas. A pocket of sewer gas exposed to a source of flame explodes, dealing moderate environmental fire damage to creatures in the area.
Stairs
Stairs are difficult terrain for characters moving up them, and shoddy stairs might also be uneven ground. Some temples and giant-built structures have enormous stairs that are greater difficult terrain both up and down, or might require Climbing every step.
Streets
Most settlements have narrow and twisting streets that were largely established organically as the settlement grew. These roads are rarely more than 20 feet wide, with alleys as narrow as 5 feet. Streets are generally paved with cobblestones. If the cobblestones are in poor repair, they could be difficult terrain or uneven ground. Particularly lawful or well-planned cities have major thoroughfares that allow wagons and merchants to reach marketplaces and other important areas in town. These need to be at least 25 feet wide to accommodate wagons moving in both directions, and they often have narrow sidewalks that allow pedestrians to avoid wagon traffic.
Walls
Well-built structures have exterior walls of brick or stonemasonry. Smaller, lower-quality, or temporary structures might have wooden walls. Interior walls tend to be less sturdy; they could be made of wooden planks, or even simply of thick, opaque paper held in a wooden frame. An underground structure might have thick walls carved out of solid rock to prevent the weight of the ground above from collapsing the structure.  
Complexity

Components of a Settlement

  • Marketplace: centers of commerce that provide the fundamental service of a settlement.

Power Structures

Outside of city limits, adventurers spend much of their time operating on their own terms, accountable only to their own moral code. But in a settlement, the heroes become part of a larger system with its own codified laws, procedures, and enforcement. The details of a settlement’s power structures shape the party’s interactions within that settlement.
Legal Codes
Most civilizations agree that laws are necessary to ensure a functioning society. The specific laws range from one settlement to another, and they might be as simple as a prohibition against murder and theft to exceptionally convoluted regulatory schemes dictating everything from clothing details to available confections. How well known these laws are can further flavor a party’s interactions with that settlement, as it’s likely easier to navigate a well‑documented system than one in which the rules are learned only through experience and word of mouth. Much like a government, the legal codes reflect the settlement’s alignment and overall nature. Generally speaking, a more lawful settlement is likely to have more complex laws, and a more lax locale to have fewer and simpler laws.

Corruption

In any settlement, it’s possible for officials to put their own interests before those of the people they serve. Corruption might be as simple as a clerk willing to accept a bribe to expedite some paperwork, or it might be as sinister as selling civilians into slavery.

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