> 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="/files/sJeQZwxieLmLJxcSCArc" 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="/pages/55e8NqVQX40WP2csQxCz">/pages/55e8NqVQX40WP2csQxCz</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="/pages/M1J2TgZC76tTPzQcqZIw">/pages/M1J2TgZC76tTPzQcqZIw</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>" %}