Modules included in this category
Prototype
Base turns the initial idea into a focused prototype. It defines what to test, the right scope, and which learning justifies expanding the rest of the GDD.
MainloopAI
AI Game Design Tool
Enhance game design with an AI game design tool inside a living GDD that connects mechanics, systems, and levels. AI is optional: you design and decide.
Choose how to begin
- Your own ideaStart from an idea, mechanic, or core you already have.
- Sample projectExplore a ready-made foundation and learn the workflow.
- Ideas with MainloopAsk for starting concepts based on your direction.
- Guided questionsDefine the project step by step with a simple guide.
Game designers, level designers, and game developers work through every decision in one modular, connected GDD.
CHOOSE YOUR EXPERIENCE OF DESIGN
Modular GDD
One GDD, two ways to design
Switch between the complete system view and its working modules.One living GDD, one source
Modules for designing every part of the game
Mainloop organizes design using the same categories as the app: Base, Design, Levels, and Development. Each module can evolve without forcing you to rewrite the whole GDD.Active module: Living GDD. The central source where every decision stays connected to the full game.
What each GDD module covers
The view summarizes the relationships. Every module stays part of the same Game Design Document, so you can review one category without losing the complete design context.
Prototype
Defines the first playable base: scope, test, hypothesis, and the minimum needed to validate the idea.
Why Mainloop
Design changes. Context should not get lost.
Three frictions appear in almost every project. Mainloop turns them into visible relationships and decisions you can follow.What happens
One decision pulls on the rest
A mechanic changes, and systems, levels, progression, and rules may need to change with it.
What changes with Mainloop
Mainloop shows those relationships so you know what to review before the design loses coherence.
What happens
Decisions become scattered
Ideas, references, and agreements spread across notes, chats, documents, and old versions.
What changes with Mainloop
Everything returns to connected modules: one source for understanding the real state of the game.
What happens
The document falls behind
A static GDD stops reflecting the game as soon as scope, playtests, or implementation change.
What changes with Mainloop
The living GDD evolves with your decisions and preserves useful context for design and development.
How it works
From the first idea to clear development materials
Mainloop turns scattered decisions into a modular design system. Every change returns to the same source, so the detail of one module never loses its connection to the full game.- Idea
- GDD
- Validation
- Prototype
- Tasks
- Iteration
Capture the idea
The process can start with your own idea or an initial AI proposal based on your goals and references.
Structure the GDD
Organize essentials, loops, mechanics, systems, levels, and open decisions into clear modules.
Validate coherence
Review contradictions, weak links, risks, and design areas that need more definition.
Move into tasks
Turn mature decisions into tasks and exportable materials with useful context for development.
Iterate without losing source
What changes in prototype or development returns to the GDD so it stays alive.
Share clarity
Use one visual, modular source to align design, levels, and development.
Included with personal plans and Studios
You don't chat with an AI. You work with Loopa.
Your creative teammate, by voice or text. She works with your open project, module and selection to explore ideas and help you move forward.
- Ask for guidance, analysis, or a second opinion grounded in your game's real context
- Give her a direction and she prepares the proposal in the right GDD module
- Say ‘apply it’: she applies the proposal to your draft and closes the card, without extra requests
See plansFree trial: 1 min per workday, up to 3 min/month of conversation · Indie: 30 min/month · Pro: 90 · Final Boss: 180 · Studio: 120 shared
Roles
One clear design source for every role
Game designers, level designers, and developers work from the same living GDD, with the context and decisions each role needs.01
Game design
Game designers
Plan and document intent, loops, mechanics, systems, and open questions without losing how each decision relates to the rest.
- Define pillars and core loop
- Turn ideas into rules
- Review coherence across systems
02
Level design
Level designers
Connect the planning of areas, levels, blockouts, puzzles, and pacing with the rest of the GDD so every space has intent.
- Define level goals
- Relate layout and mechanics
- Validate progression and pacing
03
Development
Game developers
Get design documentation with the rules, dependencies, and context needed to implement without reconstructing the original intent.
- Review rules and dependencies
- Turn decisions into tasks
- Export materials for development
Collaborative design that evolves
Your game studio, powered by AI.
Design together, evolve every module, and sync changes safely in one shared GDD.
- 2 members included
- 2 active games included
- 100 AI queries per month
- Shared Loopa: up to 120 min/month
- Add capacity only when you need it
- Automatic Studio rank from Rookie to Infinite
Game studio baseUS$19.99/month
A simple subscription keeps your game studio active. Add members, games, or AI as your team grows.
You see the total before paying. Only the billing owner can change capacity.
ACADEMYLearn by making
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Real processes, design decisions, and lessons from building Mainloop