How to write useful documentation for a Unity Asset Store package
Plan and deliver Unity asset documentation that helps customers install the package, reach a first result, understand its API, and solve common problems.
Treat documentation as part of the asset
A customer does not experience documentation as a separate bonus. It is part of the product: it determines how quickly the package can be installed, evaluated, and used in a real project. A feature-rich tool with an unclear setup can feel less complete than a smaller asset with a reliable first-run path.
Write for someone who knows Unity but does not know the assumptions behind your implementation. Explain supported Unity versions, render pipelines, platforms, required packages, and important limitations before the reader invests time in setup.
Use a structure that follows the customer journey
Start with a short overview: what the asset does, who it is for, and what result it produces. Follow it with requirements, installation, a quick start, core workflows, configuration, examples, scripting or API reference, troubleshooting, and support information.
Overview
Requirements and compatibility
Installation and updates
Quick start
Workflows
Settings
Examples
Scripting API
Troubleshooting and FAQ
Support and version history
Do not begin with a complete list of every button. First help the reader achieve one useful result. Reference pages can describe all settings later.
Design a quick start that can be verified
A quick start should state its starting conditions and visible outcome. Tell the reader which sample, scene, GameObject, component, or menu command to use. Keep optional customization out of the critical path and include a screenshot of the expected result when it removes ambiguity.
Test the instructions in a clean project with the lowest supported Unity version and again in the most common current setup for the asset. If additional packages are required, name them before the first step. If an action modifies project settings or assets, explain that effect.
Connect workflows, API reference, and troubleshooting
For editor tools and runtime systems, task-based guides and API reference solve different problems. A guide shows how several types work together; the reference defines each public class, method, property, parameter, return value, and exception. Link from a workflow to the relevant API entry instead of forcing readers to search for it.
Build troubleshooting from actual failure states: compilation errors, missing dependencies, unsupported render pipelines, incorrect import settings, lost references, or unexpected behavior after an update. For each issue, include a symptom, likely cause, resolution, and the diagnostic information needed for support.
Package and maintain the documentation
Documentation can be linked from the package, included in a downloadable archive, attached to a release, and published on the product site. A single HTML file is useful because customers can open it in a browser without keeping a generated website folder intact.
Place the asset version and documentation update date where readers can find them. Review compatibility, installation, screenshots, API entries, and troubleshooting with every release. One File Docs can combine ordinary guide pages and C# API Reference in the same searchable export, giving customers one entry point for both learning and lookup.