> For the complete documentation index, see [llms.txt](https://horizongames.gitbook.io/actorio/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://horizongames.gitbook.io/actorio/about.md).

# About

Actor I/O is a level scripting tool for Unreal Engine, featuring an input/output system similar to the **Source Engine** by Valve™ Software. At its heart, the plugin is an event binding system where actions are executed in reaction to an event being triggered. Using the C++ reflection system of Unreal Engine, the system can react to any dynamic delegate be it C++ or blueprint, and essentially call any function by name with parameters.

<figure><img src="https://1586816513-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJUOUKxX4X7uzzyzY7fQb%2Fuploads%2Fk5eu7DgVGh4bDsHeuxyl%2FAbout.jpg?alt=media&amp;token=0af4c6dc-5d2c-4ceb-8f34-fabb1f2c07e9" alt=""><figcaption></figcaption></figure>

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><mark style="color:blue;"><strong>Installing The Plugin</strong></mark></td><td>Learn more about how you can acquire the plugin, and add it to your project.</td><td><a href="/actorio/installing-the-plugin.md">Installing The Plugin</a></td></tr><tr><td><mark style="color:blue;"><strong>Usage</strong></mark></td><td>Get started with the I/O system and start scripting your game logic.</td><td><a href="/actorio/usage.md">Usage</a></td></tr></tbody></table>

### Marketplace Edition

The plugin is also available on **FAB**! The marketplace edition contains some convenience features, and it supports the long-term development of the project.&#x20;

{% embed url="<https://www.fab.com/listings/b3a3142b-8890-469a-b04f-626c5acf0d2e>" %}