GUIDE AI TO CREATE YOUR OWN 3D DETECTIVE MYSTERY GAME — WITH FIVE PREPARED PROMPTS

YOUR MYSTERY IDEA NEEDS A STARTING POINT

You can picture the room, the suspects, and the clue that changes everything. A player picks up a record, compares it with another piece of evidence, and spots a detail that does not fit. You have the mystery. Turning it into a 3D scene that responds to a player is the part you have never done.

If you have never coded a game, even the first step can feel out of reach:

• The blank editor raises questions about programming languages and game engines before you have a single scene on the screen.
• 3D characters, rooms, interactions, and debugging look like separate skills you would have to learn all at once.
• You wonder whether you need to hire a developer before you can even test whether the idea is fun.
• A vague AI request may return a text quiz, disconnected code or a mystery with clues that do not support its ending.
• Even a promising reply leaves you wondering what to ask next—and how to tell whether it is ready for the next step.

You want to test the mystery itself: can a player discover the clues and reach a fair conclusion? You do not want to spend that first session inventing prompts or trying to write the entire game from scratch.

WHEN THE NEXT STEP IS UNCLEAR

The idea stays in your notes. Or you ask AI to “make a detective game,” get a promising-looking answer, and have no clear way to check it. One fix leads to another: the scene works, but a clue is missing; the ending works, but the evidence does not explain it. Without a plan, it is hard to know what to ask next.

Commissioning a custom game can involve significant planning, time and expense. That can be appropriate for a developed project, but you may want to explore a small prototype before making that commitment.

A more manageable starting point is to separate the creative brief, the mystery’s logic and the technical build—so you have one decision to review at a time.

LET AI WRITE A FIRST BUILD YOU CAN TEST

Describe what players can inspect, what each clue reveals, and how the case should unfold. AI can turn those plain-language instructions into a case plan and draft game code, so you can begin without writing every line yourself.

Then try the build: click a clue, compare two records, and see whether the evidence supports the conclusion. Your observations give the AI something specific to revise. The missing piece is knowing what to ask—and in what order.

THE PROMPT SEQUENCE IS READY FOR YOUR MYSTERY

The five prompts are already written, organized, and refined. Case Starter gives you the request, expected response, and review checkpoint at each stage. Spend less effort inventing the AI conversation and more attention on the mystery.

Your supported choices and feedback shape the draft. The kit keeps the project compact: one case, three suspects, and three investigation phases.

The Five-Step Workflow

Send the prompts in order, keeping one case in one AI conversation. Read the response and approve its checkpoint before continuing.

1. Open a Case
   What you do: Send Prompt 1 with your chosen configuration.
   What you ask the AI to produce: A CASE SETTINGS brief.
   What you check: Your choices, one short case, three suspects and three investigation phases.
2. Choose Your Lead / Case Bible
   What you do: Approve the brief and send Prompt 2.
   What you ask the AI to produce: Suspects, a timeline, a hidden solution, and private creator notes in the Case Bible.
   What you check: Consistent motives, timelines, and accounts. Keep creator-only spoilers private.
3. Review the Evidence Plan
   What you do: Approve the Case Bible and send Prompt 3.
   What you ask the AI to produce: An evidence path for three investigation phases and a logic audit.
   What you check: Reachable clues, useful player actions and one supported conclusion.
4. Build the Case
   What you do: Approve the evidence plan and send Prompt 4.
   What you ask the AI to produce: Complete game code with dependency and launch instructions.
   What you check: Save the full code, follow its instructions and playtest before Prompt 5.
5. Inspect & Repair
   What you do: Send Prompt 5 with real test notes and the complete current game code.
   What you ask the AI to produce: A review and, where needed, complete repaired game code.
   What you check: Retest the affected actions, evidence logic, endings and replay.

Your configuration gives those requests a direction.

Shape the Investigation

Set your brief, check the live Case Preview, and copy Prompt 1 with your choices already inserted. The sidebar keeps your place; search helps you find guidance. Your separate AI chat produces the case and code.

Choose Your Investigation Tools

Picture a player inspecting a 3D object, recording a clue, and comparing it with evidence already found. The prompts request direct object interactions and character reactions, with a hint system and evidence board selected by default. Want players to question suspects? Select the optional scripted interviews. Optional inventory and a brief branching choice also stay within the same three investigation phases.

Copy, find, and follow: Use Copy prompt to copy the current prompt, or Select text to copy it manually. Search helps locate relevant prompt guidance, while stage navigation and the next assignment keep your place in the workflow.

Picture Your Museum Mystery

Choose a small museum after closing. Request clues players can inspect and records they can compare, with optional suspect interviews if you want them. Use the checkpoints above to develop the evidence before asking for the 3D build.

Illustrative setup, not a customer result or promised game output.

Choose Your Mystery Direction

These are three selectable mystery directions. The AI authors an original case for your chosen direction; they are not three finished games in the download. Choose the direction that fits your idea, then adjust the supported options.

What You Need to Get Started

What’s Included

• The downloadable Case Starter prompt tool: open it in your browser to configure a case, follow five prepared prompts, and review each checkpoint.
• Case configuration: three mystery directions plus supported difficulty, setting, tone, audience, language, detective, and investigation-tool options.
• Prompt controls: live Case Preview, copy and text selection, five-stage navigation, and search.

Is This Your Kind of Project?

For Creators Who Want to Try Their Mystery

A practical starting point for AI-curious storytellers and beginners willing to review the case, follow launch instructions, and test the result. It suits a small prototype rather than a large production-ready project.

What to Expect from AI

Designed for ChatGPT; other capable AI tools can give different results. Allow time to test your build and work through repairs. Your AI tool’s access and any charges are separate. See the disclaimer below for the limits of AI-generated output.

Frequently Asked Questions

EXPLORE THE ADVANCED CASE PACK

Setting illustrations from the Advanced prompt kit, not screenshots of finished games.

Six authored scenario briefs and prompt sequences, spanning museum theft, missing person, suspicious incident, a night train, an old theater, and a storm-bound hotel. Each has its own cast and evidence plan.

The prompts request more refined character graphics and clearer in-game guidance. Advanced is a broader prompt kit, not six finished games; the images above illustrate its settings.

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