> For the complete documentation index, see [llms.txt](https://heroicsolo.gitbook.io/heroic-engine/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://heroicsolo.gitbook.io/heroic-engine/basics/publish-your-docs/core-systems.md).

# Core Systems

These systems are used by wide range of classes and provide basic functionality for events, inputs, localization and audio processing, as well as time management and loading scenes.