GAME DESIGN DOCUMENT
Your game design document,
mapped on one canvas.
Type a prompt and Storyflow's AI builds a structured game design document board: high concept, mechanics, characters, levels, art direction, and scope, all connected on an infinite canvas. Plan everything before a single line of code. Free forever, no credit card.
Free plan
No credit card
Works in your browser
Used by creative professionals at:
Artlist
Pixar
Nike
Red Bull
The North Face
Porsche
Start from a ready-made template
Pick a board, then let AI fill it in. Every template is a real, editable starting point on the same infinite canvas.
What is a game design document?
A game design document (GDD) is the master reference for a game project: a written and visual plan that captures the core concept, mechanics, characters, world, story, levels, and production rules so every team member works from the same source of truth. Small indie teams use a GDD to stay aligned as a project evolves. Larger studios rely on it to coordinate designers, artists, programmers, and writers across months or years of development.
The traditional game design document lives in a long Google Doc or Word file. That works for linear writing, but a game is not linear: mechanics connect to levels, characters connect to lore, and systems interact in ways a flat document struggles to show. An infinite canvas gives you a spatial map of the whole design, where every section stays visible and the relationships between them are obvious at a glance.
Storyflow turns the blank-canvas problem into a prompt. Describe your game and the AI builds a structured game design document board with the right framework already in place: concept, pillars, mechanics, character profiles, world map, and task board, all on one canvas. From there you drag, edit, annotate, and expand with your own details until the board reflects exactly what you are planning.
A complete game design document covers all of these sections: high concept and elevator pitch, core gameplay loop, mechanics and systems, story and world, level design, character profiles, art direction, UI/UX and controls, audio direction, monetization (where applicable), and scope with milestones. Storyflow's AI generates cards for every relevant section based on your game description, so you never start from a blank page and never miss a section your team needs.
HOW IT WORKS
Build a game design document in four steps.
No blank page, no rigid template. The AI generates the structure and you fill it with your game.
01
Open a free canvas
Sign up in seconds. No credit card, no download. Your infinite canvas is ready in the browser and stays free forever.
02
Describe your game
Type a prompt: genre, core loop, setting, tone. The AI reads your description and picks the right framework for your GDD, covering concept, mechanics, world, characters, levels, and scope.
03
AI builds the document board
Cards for high concept, core gameplay loop, mechanics, characters, world, levels, art direction, and a task board appear on the canvas, structured and ready to edit.
04
Expand, refine, and share
Drag cards, add sticky notes, drop in reference images and sketches, then share a view-only link with your team or export as a PDF for pitches and funding applications.
Every section of your GDD in one place.
High concept, mechanics, characters, world, levels, and tasks on the same canvas. No more hunting across five documents.
AI-generated structure covering every GDD section
Start from a complete GDD framework
Describe your game and the AI generates a board with the sections a real game design document needs: high concept and pillars, core gameplay loop, mechanics overview, character roster, world and lore, level plans, art direction, UI/UX notes, and a production scope. You start from a full framework, not a blank page.
See the AI mind map generator →
Character profiles and roster mapped on the canvas
Build your character roster visually
Create a card for every character with name, role, backstory, abilities, and relationships. The canvas keeps the whole roster visible so you see how characters connect without losing detail on any one of them. Link characters to the lore, mechanics, and level sections they appear in.
Try story planning →
Worldbuilding board for lore, story, and world rules
Map the game world and its story
Build a worldbuilding and story section alongside your mechanics: geography, factions, history, narrative arc, and the rules that govern how the world works. Keep lore, story beats, and design rules on the same board so writers and designers stay in sync from day one.
See worldbuilding tools →
Task board for scope, milestones, and production progress
Track game dev tasks on the same canvas
Add a task board next to the design sections and track your scope and milestones. Features, bugs, sprints, and team assignments live beside the document they relate to, without switching to a separate project management tool.
Try the AI kanban board generator →Free forever. No credit card.
Open a canvas, describe your game, and watch the GDD board take shape. The free plan has no time limit and no board limit.
Unlimited boards on an infinite canvas
Basic AI usage to generate your GDD structure
3 starter frameworks built in
Share view-only links with your team
BUILT FOR GAME DEVELOPMENT PLANNING
More than a game design document template.
Storyflow is an AI-native canvas for planning and documenting games. Your GDD sections, worldbuilding, character maps, art direction notes, and task board all live on one board.
200+ frameworks including game-ready GDD structures
Pick a framework or let the AI choose
Game design frameworks: Choose from MDA (Mechanics, Dynamics, Aesthetics), core loop mapping, level design frameworks, and narrative structure maps. The AI suggests the right one based on your game description and the sections your project needs.
200+ frameworks total: If your game borrows structure from narrative design, mind mapping, or kanban, those frameworks are available too. Start with the GDD framework and pull in a worldbuilding or story outline structure alongside it.
Remix and combine: Start with one framework and drag in sections from another. The canvas is flexible: your GDD can include a high concept card next to a kanban milestone board next to a character relationship map.
Drop PDFs, notes, reference images, and links on the canvas
Bring every reference onto the board
Drop files directly: Drag concept art, reference PDFs, competitor screenshots, design notes, and spreadsheets onto the canvas. They sit next to the GDD sections they inform: art direction references beside art direction notes, for example.
Grab frames from gameplay video: Capture stills from YouTube and Vimeo gameplay videos and pin them next to the mechanics or level sections they illustrate. A reference without context is just noise; on the canvas, each frame stays beside the section it informs.
Sketch with the pen tool: Draw rough level maps, UI wireframes, or ability diagrams directly on the canvas. No need to leave Storyflow to sketch an idea, and sketches live next to the relevant GDD section rather than in a separate file.
AI that keeps your whole game in context
Ask the AI to expand any GDD section
Canvas-aware AI: The AI reads everything already on your board before it responds. Ask it to expand the magic system, flesh out the art direction section, add three more characters, or suggest level progression, and it works from what you have already planned rather than starting cold.
Iterate without starting over: Prompt the AI to refine a mechanic, rewrite the pitch, restructure the scope section, or add monetization notes. It updates the board while keeping everything else intact.
Unstick your design: Stuck on a mechanic, a world rule, or how to structure the audio direction section? Ask the AI for options and place the best answer on the board. Fast design exploration without leaving the document.
Real-time collaboration and export
Share the GDD with your team
Real-time collaboration: Invite teammates to edit the board together. Designers, writers, and artists work on the same canvas at the same time. Changes are visible the moment they are made.
View-only links: Share a view-only link with publishers, mentors, or stakeholders who need to read the GDD without editing it. No sign-up required on their end.
Export as image or PDF: Export any section or the full board as a high-quality image or PDF for pitch decks, funding applications, or offline review. Send a view-only link for live exploration of the canvas.
WHO IT IS FOR
Who uses Storyflow for game design documents?
Solo developers, small teams, students, and jam teams building games of any scale.
Indie developers
Write the full GDD before you start building. Map the high concept, core gameplay loop, mechanics, characters, levels, and scope on one canvas so the design is clear before you open Unity, Unreal, or Godot. Update it as the game evolves without hunting through a long document.
Game design students
Learn to structure a game design document on a free plan with no time limit. Use the AI to generate a starting framework covering all the required sections, then replace every section with your own design. The canvas makes the structure visible in a way a blank doc cannot.
Narrative designers and writers
Build the story, character, and world sections of the GDD on a visual board. Map story branches, character arcs, dialogue structure, and lore notes alongside the mechanics they connect to, rather than in a separate document that drifts out of sync.
Game jam teams
In a 48-hour jam you cannot afford a slow planning tool. Type your concept, get an AI-generated GDD board in seconds covering concept, mechanics, and scope, assign sections to teammates, and start building with a shared plan everyone can see.
Designers pitching publishers
Turn the game design document into a structured board that tells the story of the game visually. Export it as a PDF for the pitch deck, or send a view-only link so the publisher can explore the high concept, mechanics, world, and monetization plan at their own pace.
Small studio teams
Keep designers, artists, and programmers aligned by putting the GDD on a shared canvas everyone can access. Real-time collaboration means art direction, scope updates, and mechanic changes are visible the moment they are made, not buried in a Slack thread.
HOW WE COMPARE
Storyflow vs Milanote, Notion, and Nuclino.
All four tools can hold game design notes. Here is an honest look at where each one fits.
Storyflow
Recommended
Free plan with unlimited boards
AI builds the GDD from a prompt
AI uses your whole canvas as context
GDD, worldbuilding, and task board on one canvas
Infinite visual canvas
200+ built-in frameworks
Milanote
Free plan with unlimited boards
AI builds the GDD from a prompt
AI uses your whole canvas as context
GDD, worldbuilding, and task board on one canvas
Infinite visual canvas
200+ built-in frameworks
Notion
Free plan with unlimited boards
AI builds the GDD from a prompt
AI uses your whole canvas as context
GDD, worldbuilding, and task board on one canvas
Infinite visual canvas
200+ built-in frameworks
Nuclino
Free plan with unlimited boards
AI builds the GDD from a prompt
AI uses your whole canvas as context
GDD, worldbuilding, and task board on one canvas
Infinite visual canvas
200+ built-in frameworks
What creators are saying
Join early creators getting structured workspaces and AI that remembers their projects
“Storyflow has sped up my workflow by at least 3x, which means more flow state and more projects I can actually ship. It truly changed the way me and my team create.”
Reilin Joey
Director & YouTuber
“One prompt gets me a structured board. But the tactics are my favorite. I run my YouTube scripts through them and my intros and retention got better. It's amazing.”
Justkay
YouTuber & Freelance Filmmaker
“I used to juggle five apps to plan a project. Now I describe what I am making and get boards, lists, and a schedule. All in one place.”
George
@fernwehchronicles
Game design document questions, answered.
Everything people ask about writing and organizing a game design document with Storyflow.
A complete game design document should include these core sections: high concept and elevator pitch, core gameplay loop, mechanics and systems, story and world, level design plans, character profiles, art direction, UI/UX and controls, audio direction, monetization (where relevant), and scope with milestones. The exact depth of each section depends on your team size and project stage. A solo developer at a jam may cover just the first four; a studio production GDD covers all of them in detail. Storyflow's AI generates cards for each relevant section based on your game description.
Your game design document starts here.
Describe your game, let the AI build the board with every section your GDD needs, and plan every mechanic, character, and level before you open your engine. Free plan, no credit card.