How to make a Mobile Game Design Document – [ A Quick Guide ]

Suppose you are planning to collaborate with a game app development company for building one of the most interesting games for the target audience. The viral game that you see on the App Stores is designed and developed after 100 sleepless nights and technical fixtures done by the experts.

In actual working, the team behind the game development has to pen down the imagination, the characters, and the mechanics that will become a part of the game and that’s actually a big deal. Understanding what the clients have in their heads, and then mapping it out requires a lot of effort.

You simply need a map to design the game and that is known as a game design document.

Now, if you are a deep-thinker then, you must be thinking, will that game design document be a 100 pages book with codes, design layouts and other possible attributes? The answer is no. The modern game design document considers a single critical tool for production of the clarity of the games and making the readers understand everything in a single go.

A well explained game design document works as a blueprint of the game, giving the end users a clear understanding of the ideas, and making everyone understand the dynamics.

Therefore, in this article, we will walk you through the key steps vital for building a game design document for the gamers, and other individuals who plan to work on it.

So, are you excited to explore it with us? Let’s get started then.

Interesting Statistics About Mobile Gaming – Key Findings

We picked these facts from different platforms, and majorly from Statistia, Moloco, and more.

• Global Market Dominance: In 2024, mobile games accounted for 49% of the total global gaming market, with revenues reaching roughly $92 billion.
• 2026 Projections: The market is projected to grow to over $133 billion globally in 2026.
• Revenue Growth Drivers: Despite a 7% decline in total downloads in 2024, in-app purchase (IAP) revenue actually grew 4%, signaling that players are spending more on fewer, higher-quality games.
• Top Markets by Revenue: The USA, China, and Japan remain the top three powerhouses in revenue.
• Fastest Growing Markets: Turkey, Mexico, India, Thailand, and Saudi Arabia are seeing significant growth in consumer spending, with 2024 IAP growth rates exceeding 15% in some areas.

Now that we are done with the facts discussion, now we are going to learn about the meaning behind mobile game design documents. Mobile games play a great role in modernised gaming, and giving the customers a great experience using modernised technologies like AR and VR.

What is a mobile game design document?

A game design document is basically a blueprint or the skeleton for the entire video game project. Just like we create a functional and no functional requirement document for the mobile app that further is shared with the team members for discussion.

A well explained and written game design document defines the mission, vision, and key modules that would be present within the gaming solution for keeping the artists to the programmers, and animators fully informed about the projects.

You would be amazed to know that team members who are working on the specific game read the game design document very thoroughly and you learn what is about to happen. Startups to large-scaled enterprises, all are now creating game design documents to maintain transparency and visibility.

How to make a game design document? – [Key Steps]

So, the entire focus of the blog was to discuss the steps leading to a successful creation of the mobile game app. Let’s unfold the magic!

Step:1 – Define Core Concept for Mobile Game

The first step is to put forward your game idea into a single and clear sentence known as vision. It will help in understanding what is the primary purpose of building that mobile game.

Later you may identify the concepts, goals and other key dynamics for the mobile game. You can easily address the problem statement in the game design that would help you aim to resolve the opportunities and set the Design Pillars for further steps.

Step:2 – Selection of Tools and Format for Mobile Game

You know, the format that you are going to explain within the mobile game document is going to play a great role in captivating new audiences? A rigid written document would become really difficult for the team members to understand and then, work on it. Whereas, a simple and easy to understand game design document with all the tools, animation and background discussed would make a huge difference.

The most common choices for creating the document include collaborative software like Notion. Visual board tools like Milanote are also excellent for the creative aspects. A lot of people are still searching for the platforms through which they could make the game design document and spend less time on the research.

Step:3 – Keep the Game Design Document Minimal 

The next steps would include the creation of the game design document that should be one-page and focuses entirely on high-level concepts. It means that the game document should have everything written in the simplest way, concluding within a page or so.

Once you have written everything in a summarised format, you can later extend it for more than 20 pages that could include the game mechanics, animation techniques, background choices and other steps necessary for building the mobile game.

Once done, you may convert the document to a PDF format, and share it with the team members to allow them to work on it.

Step:4 – Gameplay Detailing and Visuals for the Mobile Game

And we are almost close to the finalisation stage. At this stage, you can define the core gameplay loop and add the top-down maps for the environment. You may explain the gameplay visuals by adding some examples and references to images to better explain to the designer what the game play characters would look like.

It’s really important to focus on the visuals on the game play characters because if you miss out on the visuals then, there would be 70% chances that no one is going to download your game for a longer time.

Step:5 – Defining Technical Tools and Backend for the Mobile Game

Now that your team will work on the backend of the mobile game the next step would include the clarity upon mobile game engines and what would be the best one possible. There are many engines like Unreal, CryEngine, Unity and a lot more available for mobile game development.

Step:6 – Deciding on Monetization Strategies for Revenue Generation

You may further decide with the mobile game monetization and see how you can generate revenue through the mobile game. You can list the purchase models, ads, and downloadable content for the end users. You can add a premium version to enable the players and the users to pay for the other levels unlocking and generate huge revenue.

Step:7 – Review the Game Design Document 

Lastly, you may update the game design document as per the new launches of any engine to keep it 100% updated. Keep the version-controlled accessible so the entire team members who are accessing the document can see the edits.

Why Is Game Design Document Acquired By The Companies?

The irony is, there are still a lot of game design documents available in the market with 100+ pages and making it difficult for the readers to read and understand. Whereas, the modern game design document is a clear and straightforward document that remains simple and easy to understand.

A modernised game design document will rely entirely on the iterative design models, where you don’t have to write contracts that seem static and can not be tweaked further. Instead, you create a living document that adapts alongside the game itself.

• Agile Workflow Management

The modern game design document follows an agile workflow where the team members plan the sprints, and mini tasks within it. Each of the assigned tasks is discussed everyday in 1-min scrum and if any shortcomings are there, it is also discussed. Perhaps, it becomes a great part of the creation of modern game design documents.

• Prevention in Scope Creep

If you research a bit, you would learn that a well explained game design document helps in managing scope creep. It actually happens when a small and unplanned feature is accumulated, and the results are exceeding the budget and timeline is already near. Perhaps,a  game design document helps in defining the gaming pillars beforehand. Nobody works beyond the game design document and the entire team knows what’s gonna happen next.

• Avoiding Miscommunication

A well explained and modernised game design document will help in avoiding the miscommunication and it acts as a collective brain, facilitating the communication gap across the distributed teams.

Game Design Document Examples

Here are the core examples of game design document:

• One-Page GDD (Indie / Prototype)

Best for: game jams, small teams, early concepts

Example

• Title: Echo Runner
• Genre: 2D Platformer
• Target Platform: PC
• Core Fantasy: Move so fast you outrun your past mistakes.

• Classic GDD (Mid-Size Projects)

Best for: student projects, indie teams, serious planning

• Title: Iron Skies
• Genre: Tactical RPG
• Platform: PC / Console
• Target Audience: Strategy fans, ages 16+

•  Living GDD (Modern / Agile)

Best for: ongoing development, live updates

Instead of one giant doc, it’s split into modules:

• Vision Doc – What the game is
• Mechanics Docs – One per system (combat, economy, AI)
• Content Docs – Levels, enemies, items
• UX Docs – UI flows, wireframes
• Tech Docs – Engine, tools, constraints

• AAA-Style GDD (Excerpt)

Best for: large teams (mostly for reference)

Sections include:

• Market analysis
• Monetization strategy
• Accessibility requirements
• Localization
• Performance budgets
• Legal/IP considerations

Common Mistakes To Avoid In Game Design Document Creation

Learning about the ways by which you can develop a well explained game design document requires the high-end involvement of the team members. Here are some common mistakes that you can avoid to get a better version of your GDD.

• Writing a Giant 100 Pages Game Design Document

As we have already discussed this valid point in the blog, writing a 100 pages game design document would result in another but making the readers go bored and irritated. Instead, the best way out is to write a to-the-point game design document that comprises all the necessary gaming features, requirements, and visual references for the team members for smooth execution.

• Neglecting Non-Design Stakeholders

We have seen live examples of many game design documents, GDD where the document is created only for the technical team members. However, neglecting the other stakeholders like designers, marketers, and testers is a step backward. You should create the game design document keeping all the stakeholders in mind.

• Ignoring Updates

If you are not updating the game design document after the successful completion of it then, you are missing out on one of the most important aspects of GDD. You should keep an eye on the updates, and fixtures that are launched by gaming engines or other dynamics to keep the game design document updated.

• Avoiding Visual Examples

Lastly, the game design document has everything related to the technical frameworks and technologies and misses out the necessary points related to visuals and the references. Therefore, it’s necessary for the game developers to focus on the visual aspects and add the references for better creation.

Key Takeaway – Understanding the process to create mobile game design document

And we are done for the day. We hope you all enjoyed reading about the process related to mobile game design document creation and how you can build the best version of it. If you think we have missed anything feel free to share it with us in the comments section. We would love to hear it back from you.

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