---
key: practice/signal-room
type: practice
id: signal-room
lang: en
title: The signal room
summary: Build a puzzle around a consistent rule and a player discovery.
updatedAt: '2026-10-20'
status: active
url: 'https://gamemechanics.pro/en/knowledge/practice/signal-room/'
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markdownUrl: 'https://gamemechanics.pro/content/knowledge/en/practice/signal-room.md'
aliases: []
tags:
  - Puzzles
sourceIds:
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  - source-6f794a271cd60b9c
sources:
  - id: source-3e6c21889ae768e0
    title: 'Challenges for Game Designers: author website'
    url: 'https://designgames.wordpress.com/'
    verifiedAt: null
  - id: source-6f794a271cd60b9c
    title: 'Challenges for Game Designers: table of contents'
    url: 'https://designgames.wordpress.com/toc/'
    verifiedAt: null
relations:
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    direction: incoming
    label: What this helps you learn
    key: lesson/teaching-a-mechanic
    title: Teaching one mechanic through a level
    url: 'https://gamemechanics.pro/en/lessons/teaching-a-mechanic/'
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    label: What this helps you learn
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    title: Level design
    url: 'https://gamemechanics.pro/en/learn/level-design/'
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  - type: uses
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    label: Sources in the selection
    key: resource/challenges-for-game-designers
    title: Challenges for Game Designers
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placements:
  - title: In the original collection
    url: 'https://gamemechanics.pro/en/practice/#signal-room'
supersededBy: []
attributes:
  topic: puzzles
  level: intermediate
  minutes: 60
endsAt: null
provenance: >-
  Thematic inspiration: Challenges for Game Designers by Brenda Brathwaite and
  Ian Schreiber. These scenarios, constraints and checks are independently
  written around broad game-design learning topics. This is not a translation or
  a sequential retelling of the book exercises.
license: CC-BY-4.0
codeLicense: MIT
attribution: gamemechanics.pro contributors
---
# The signal room

id: signal-room
type: practice
key: practice/signal-room
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/practice/signal-room/

Build a puzzle around a consistent rule and a player discovery.

## Goal

Build a puzzle around a consistent rule and a player discovery.

## Scenario and materials

A control panel has four levers and three lamps. Invent a rule that connects lever positions to the lamps. The player must produce a target signal. Create three levels: discovering the rule, checking it and using it in an unexpected combination.

Paper prototype

## Constraints

- The same rule applies at every level.
- Available information allows a solution without random trial and error.
- The third level is harder because it combines conditions, not because it introduces a hidden rule.

## Steps

1. List the panel states and confirm the target states are reachable.
2. Prepare three levels and a solution for each.
3. Give them to someone who has not seen the rule. Record where they get stuck and revise the clues.

## Deliverable

Three panel diagrams, the rule, solutions and a note from the new-player check.

## Check your work

- Each level has at least one known solution.
- Clues agree with the rule.
- Identify the specific discovery the player needs to make.

## Reflect

Was the player struggling to understand the rule or to apply a rule they already understood?

## Connected materials

- What this helps you learn: [Teaching one mechanic through a level](https://gamemechanics.pro/en/lessons/teaching-a-mechanic/) (key: lesson/teaching-a-mechanic)
- What this helps you learn: [Level design](https://gamemechanics.pro/en/learn/level-design/) (key: path/level-design)
- Sources in the selection: [Challenges for Game Designers](https://gamemechanics.pro/en/resources/#resource-challenges-for-game-designers) (key: resource/challenges-for-game-designers)

## Sources and provenance

Thematic inspiration: Challenges for Game Designers by Brenda Brathwaite and Ian Schreiber. These scenarios, constraints and checks are independently written around broad game-design learning topics. This is not a translation or a sequential retelling of the book exercises.

- [Challenges for Game Designers: author website](https://designgames.wordpress.com/) (id: source-3e6c21889ae768e0)
- [Challenges for Game Designers: table of contents](https://designgames.wordpress.com/toc/) (id: source-6f794a271cd60b9c)

CC-BY-4.0 · gamemechanics.pro contributors