> For the complete documentation index, see [llms.txt](https://g3m.gitbook.io/g3mwiki/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://g3m.gitbook.io/g3mwiki/readme.md).

# G3M

G3M manages mods for GameMaker games. Install a mod, select it in the Library, and launch the game with that selection. The normal launch mode restores the game files after the game closes.

The application is version **3.4.3**, distributed under GPL-3.0. Release packages support Windows, Linux, and macOS on x64 and ARM64.

## Choose a guide

| Task                                      | Page                                                                                                                                      |
| ----------------------------------------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| Install G3M and play a mod                | [Getting started](/g3mwiki/getting-started.md)                                                                                            |
| Install files without a `mod_config.json` | [Manual Mod Installation](/g3mwiki/mod-packages/importing.md#files-without-configuration)                                                 |
| Find and manage mods                      | [Mods Browser](/g3mwiki/interface/mods-browser.md), [Library](/g3mwiki/interface/library.md)                                              |
| Combine mods or use addons                | [Priority and steps](/g3mwiki/mod-packages/modpacks.md)                                                                                   |
| Create or edit a mod                      | [Desktop editor](/g3mwiki/mod-packages/mod-editor.md), [web editor](/g3mwiki/mod-packages/web-editor.md)                                  |
| Write a mod configuration                 | [mod\_config.json reference](/g3mwiki/mod-packages/mod-config.md)                                                                         |
| Install plugins or themes                 | [Catalog](/g3mwiki/features-and-extensions/catalog.md)                                                                                    |
| Create a plugin or theme                  | [Plugin API](/g3mwiki/features-and-extensions/plugins-development.md), [theme packages](/g3mwiki/appearance-and-themes/theme-packages.md) |
| Investigate a failed launch               | [Diagnostics](/g3mwiki/features-and-extensions/diagnostics.md), [troubleshooting](/g3mwiki/reference-and-help/troubleshooting.md)         |

Built-in game entries cover DELTARUNE, DELTARUNEdemo, UNDERTALE, UNDERTALE Yellow, Pizza Tower, Sugary Spire, and FRICKBEARS3. [Custom games](/g3mwiki/playing-and-managing-games/custom-games.md) provide a single-game entry for other GameMaker games.

Download the application from [GitHub releases](https://github.com/y114git/G3M/releases). Community help is available on [Discord](https://discord.gg/2MFdvFfD9a) and [Telegram](https://t.me/y_maintg).