Builder's Manual · Chapter 20

From Empty Project to Playable World

This chapter walks you from an empty project to a world ready for play. It introduces no new system — it demonstrates the process the rest of this manual teaches, step by step.

Answer what matters now. Defer what does not.

Step 1 — Define the premise

Decide the basic concept: what kind of grounded medieval world is this? Where does play begin? What kinds of lives are possible there? Are there unusual truths the system must respect — a strange inheritance custom, a prestige-without-power nobility, a rare truth-telling institution? What tone and level of groundedness do you intend?

A paragraph of honest intent outweighs pages of history. Do not write a complete world chronicle.

  • Required for opening: one clear premise and starting place.
  • Defer until relevant: deep history, distant lands, full cosmology.

Step 2 — Establish the immediate geography

Define enough ground for the opening: the starting area's terrain, water, and climate; nearby countryside; important roads, rivers, and crossings; neighboring settlements in outline; obvious boundaries where they matter.

Relative position beats exact survey. If you can answer how someone gets from here to there in this season, your geography suffices.

  • Required: starting area, its neighbors, its travel relationships.
  • Defer: distant regions, every road, exact distances.

Step 3 — Establish the starting settlement

Give the opening settlement what play needs: who lives here, what supports it, what work exists, where food, water, and fuel come from, what is made locally and what must arrive from elsewhere, who holds authority, which institutions matter, how people travel in and out, and what makes this place distinct.

Aggregate, do not enumerate. Conditions and pressures, not building-by-building inventory.

  • Required: livelihood, authority, market and labor truth, current pressures.
  • Recommended: neighboring settlements in outline, seasonal vulnerabilities, one live tension.
  • Defer: every building, resident, shop, and street.

Step 4 — Establish essential Project truth

Record the world facts play cannot safely infer: cultures and religions in practice, law and custom for foreseeable situations, political structure, inheritance where immediately relevant, unusual customs, technology, currency and economic conventions, any supernatural facts your world contains, and the historical facts that shape the opening.

Only what opening play requires. Depth where your focus lies; generality elsewhere.

Step 5 — Establish authority

Name who can actually do what: ruler where relevant, local officials, landholders, courts, religious authorities, household heads, employers. Title is not office, and neither is authority — record what each power genuinely permits and who granted it.

  • Required: whoever decides the disputes play will plausibly raise.
  • Defer: full hierarchies, distant offices, appellate procedure.

Step 6 — Establish ordinary life and work

Sketch how people live: common occupations, agriculture and crafts, markets and resources, seasonal rhythms, household production, employment patterns, specialist services. Anchor your economic scale — what an ordinary day's labor earns — so prices, wages, and debts mean something.

No universal tables. No workplace for every worker.

Step 7 — Establish only the people who matter now

Persist the characters continuity requires: household members, the employer, the official, the neighbor, the craftsperson, the leader, the rival. Everyone else remains background — real, present, and unfiled until relevance calls.

Step 8 — Establish organizations, property, and realm context

Create only what the opening needs: an organization where collective identity matters, a property where ownership or tenure matters, a business where enterprise matters, a household where shared resources matter, an employment where work terms matter, a realm where governance matters. Never one of each to "complete" the project. A village campaign may need almost no formal politics; a court campaign may need a great deal. Let premise set depth.

Step 9 — Establish the player's entry conditions

Fix what is true when play begins: where the character is, their circumstances, employment and household if any, possessions, money, relationships, memberships or offices if any, health, obligations, and what they actually know. Begin on an ordinary morning if that is honest. No mandatory opening crisis. A quiet arrival with debts, duties, and prospects is plenty.

Step 10 — Check what can remain unknown

Ask directly: what have I not decided because it does not matter yet? Distant rulers, remote settlements, exact populations, future conflicts, every family, distant law, every road and merchant — all healthily unknown. Unknown is allowed. Leave it undefined with confidence.

Step 11 — Begin play

Once the opening is coherent, begin. The living world develops from choices, work, relationships, households, businesses, property, travel, information, organizations, politics, health, time, ordinary days, and major life events. Pre-script nothing. The world is ready to be simulated, not already written.

Step 12 — Expand when relevance arrives

As play reaches new people, places, institutions, laws, and conflicts, establish each in turn — fitting existing truth, consulting reference for baselines, persisting only what continuity needs. Ordinary new places stay ordinary. This is Chapter 18 in practice; return to it whenever the horizon widens.

Minimum Playable World checklist

Required for opening

  • Premise and starting place.
  • Immediate geography and travel relationships.
  • Starting settlement: livelihood, authority, market, labor, pressures.
  • Essential law, custom, and culture for foreseeable play.
  • Economic anchor: what ordinary labor earns.
  • People who matter now, with honest circumstances.
  • Player entry: location, situation, obligations, knowledge.
  • Coherent date, season, and opening situation.

Recommended for depth

  • Neighboring settlements in outline.
  • Governing realm: ruler, stability, demands.
  • Important organizations and institutions.
  • Seasonal pressures and harvest timing.
  • One or two tensions already in motion.
  • Local religion and festivals in practice.

Defer until relevant

  • Distant settlements, rulers, and histories.
  • Complete legal codes and theologies.
  • Every resident, building, road, and shop.
  • Detailed military structures.
  • Future conflicts and campaign plots.
  • Anything play has not reached yet.

Establish the world. Respect the authorities. Let consequences emerge.

Start small. Build coherently. Let ordinary life matter. Let people keep their agency. Let the world grow through play — and see what becomes of it.

Manual updated Sep 8, 2026.