Document the EasyRPG player for RPG Maker 2000/2003 games

docs/Navigation.md

@@ -55,6 +55,7 @@ search:
     - [Downloads](using/downloads.md)
     - [Uploads](using/uploads.md)
     - In-Browser Play
+        - [EasyRPG](using/in-browser-play/easyrpg.md)
         - [EmulatorJS](using/in-browser-play/emulatorjs.md)
         - [`js-dos`](using/in-browser-play/js-dos.md)
         - [MS-DOS](using/in-browser-play/ms-dos.md)

docs/reference/glossary.md

@@ -35,7 +35,7 @@ These are the terms the docs, UI, and API use consistently. Foundational concept
 
 **Firmware**: BIOS or system firmware required for certain emulators (PS1, GBA, Saturn, etc.). Lives wherever the [`filesystem.structure.firmware`](configuration-file.md#filesystemstructure) template points, `bios/{platform}` by default. Uploaded via the UI and managed by admins and users with the `firmware.write` scope (see [Firmware Management](../administration/firmware-management.md)).
 
-**Full image**: the default container variant, bundling all four browser runtimes (EmulatorJS, Ruffle, `js-dos`, FAKE-08). `rommapp/romm:X.Y.Z` (see [Image Variants](../install/image-variants.md)).
+**Full image**: the default container variant, bundling all five browser runtimes (EmulatorJS, Ruffle, `js-dos`, FAKE-08, EasyRPG). `rommapp/romm:X.Y.Z` (see [Image Variants](../install/image-variants.md)).
 
 **Game Data tab**: the ROM detail page tab for saves, states, and screenshots. User-specific.
 

docs/resources/snippets/env-vars.md

@@ -145,12 +145,13 @@
 
 ### Emulation
 
-| Variable              | Default | Required | Description                                              |
-| --------------------- | ------- | :------: | -------------------------------------------------------- |
-| `DISABLE_EMULATOR_JS` | `false` |          | Disable in-browser play via EmulatorJS                   |
-| `DISABLE_RUFFLE_RS`   | `false` |          | Disable in-browser Flash playback via RuffleRS           |
-| `DISABLE_JSDOS`       | `false` |          | Disable in-browser Win3.x and Win9.x playback via js-dos |
-| `DISABLE_PICO8`       | `false` |          | Disable in-browser PICO-8 playback via FAKE-08           |
+| Variable              | Default | Required | Description                                                 |
+| --------------------- | ------- | :------: | ----------------------------------------------------------- |
+| `DISABLE_EMULATOR_JS` | `false` |          | Disable in-browser play via EmulatorJS                      |
+| `DISABLE_RUFFLE_RS`   | `false` |          | Disable in-browser Flash playback via RuffleRS              |
+| `DISABLE_JSDOS`       | `false` |          | Disable in-browser Win3.x and Win9.x playback via js-dos    |
+| `DISABLE_PICO8`       | `false` |          | Disable in-browser PICO-8 playback via FAKE-08              |
+| `DISABLE_EASYRPG`     | `false` |          | Disable in-browser RPG Maker 2000/2003 playback via EasyRPG |
 
 ### Integrations
 

docs/using/in-browser-play/easyrpg.md

@@ -0,0 +1,49 @@
+---
+title: EasyRPG
+description: Play RPG Maker 2000 and 2003 games in the browser
+---
+
+# EasyRPG
+
+RPG Maker 2000 and 2003 games run in the browser on the [EasyRPG Player](https://easyrpg.org), an open-source reimplementation of the RPG Maker 2000/2003 engine built to WebAssembly. Put games under the `rpg-maker` platform (an `easyrpg` folder maps to it too) to play them.
+
+<!-- prettier-ignore -->
+!!! info "Full image only"
+    The player and the free RTP are bundled in the full container image and have no CDN fallback, so RPG Maker games do not play on the slim image (see [Image Variants](../../install/image-variants.md)).
+
+Server owners can turn the player off with `DISABLE_EASYRPG=true` (see [Environment Variables](../../reference/environment-variables.md)).
+
+## Game folders
+
+The player fetches each file of a game as it needs it, so it can't open an archive. A game must be an extracted folder with `RPG_RT.ldb` at its root, the same layout the game shipped in:
+
+```text
+roms/rpg-maker/
+└── Yume Nikki/
+    ├── RPG_RT.ldb
+    ├── RPG_RT.lmt
+    ├── Map0001.lmu
+    ├── CharSet/
+    └── Music/
+```
+
+Zipped games show up in the library but have no Play button.
+
+## Run-time package
+
+Many games rely on the RPG Maker run-time package (RTP) for shared graphics and sounds instead of shipping them. RomM bundles the free [EasyRPG RTP](https://github.com/EasyRPG/RTP) and hands its files to any game that asks for an RTP asset by its Japanese or translated name. A game's own files always win over the RTP's.
+
+The free RTP is partial: it has system graphics, character sets, music and sounds, but no battle backgrounds and few monsters or battle animations. Games that depend on the RTP play, with assets missing mostly in battles.
+
+## Controls
+
+The player brings its own controls: keyboard, gamepad and on-screen touch buttons.
+
+## Saves
+
+Saves stay in your browser, separately for each RomM account, and don't sync back to the server.
+
+## Related
+
+- [EmulatorJS](emulatorjs.md): the libretro-core player behind most platforms
+- [PICO-8](pico-8.md): another native, non-EmulatorJS player

docs/using/index.md

@@ -7,6 +7,7 @@ description: Browse, play, collect, patch, and share from the UI
 
 ## Browse and play
 
+- **[EasyRPG](in-browser-play/easyrpg.md)**
 - **[EmulatorJS](in-browser-play/emulatorjs.md)**
     - **[MS-DOS](in-browser-play/ms-dos.md)**
 - **[`js-dos`](in-browser-play/js-dos.md)**