No.012 / 280Build & manage · Building & space

What Counts as a Room

Four walls are not always a room; meet the rules and it starts working.

Prototype complexity
Who plays: Solo decisions
Design focus: Spatial · Planning · Information

No.012Terraria

01The core loop

Action → feedback → next choice

01Enclose a space
02Add required furniture
03The game checks the room
04Gain a function or resident

↻Feedback changes the situation — the next round starts from there.

Walk through one round

A simplified design example. Situations and numbers illustrate the mechanic, not exact rules from a reference game.

T1
Turn 1 · The situation
A new 5×4 room still attracts no resident.
T2
Turn 2 · The player chooses
Run the housing check, find no light, add a torch.
T3
Turn 3 · The feedback
The room qualifies and a merchant moves in next day.
T4
Turn 4 · The next decision
Build the next room and mind each resident's preferred surroundings.

How it plays

The game classifies a space by enclosure, size, lighting and specific furniture. Meeting the rules unlocks residents, efficiency or mood bonuses, and failing shows what is missing.

What the player weighs

Many small rooms or a few polished ones
Meet the checklist or build for looks

02Start small

Quest · 0/3Prototype complexityConnected systemsWho plays · Solo decisions

Scope is an editorial estimate for the minimum prototype, not the reference game or a production schedule.

03One mechanic, different implementations

Terraria

NPC housing needs walls and background walls, a door, a light, a table and chair and a minimum size, and a housing query reports what is missing.

RimWorld

Rooms are recognized as bedrooms, dining rooms or hospitals by their furniture, and an impressiveness score from size, cleanliness and decor affects mood.

The difference worth noticing

Terraria uses a pass/fail bar; RimWorld adds a continuous quality grade on top.

Case notes are Yoroll editorial summaries; rules may change between versions.