Data source for Rusted Moss Mod Manager. Most of these mods can be downloaded in-game, once it's installed.

You can check out my modding documentation for information on how this works or how to install RMML. Example mods are included in the demo folder.

Here's all the (publicly) included mods and their authors. If an author isn't shown, I (Harlem512) made it.

• Archipelago Client
• Palette Editor
• Maya and Ameli Palette
• Ghost Multiplayer
• Bugfix
• Checklist
• Gimmick
• Grapple Preview
• Minify!
• Minimap
• More Saves
• More Saves: Arch Plugin
• Preserve Window
• Puntable
• Pursuit
• Speedrun Timer Control

There's also an (unfinished) portal gun mod on another branch and some sample code to make new rooms.

The Archipelago Client for use with the Archipelago randomizer. View setup/usage information at MrL's repo.

In-game editor for character palettes. Supports Maya and Ameli Palette (installed separately). More information available at Snowill's repo.

Lets you customize the color palette for Maya and Ameli, like you can with Fern. Edit mods/rmml/{name}/palette.png with your colors, similar to Fern. Example palettes and a list of what each color means is included.

Each mod is installed and managed separately, but can be installed together.

Multiplayer for Rusted Moss! Lets you see (but not interact with) your friends. Also press O (rebindable in the menu) to open the emote wheel.

To use, download the mod, then press the Fern icon on the main menu to open the multiplayer menu. From there, create a lobby and invite your friends. Settings are also available in the menu.

Fixes a few bugs with Rusted Moss.

• One-shotting Elicia (ie with Ameli #5 combo) causes a crash
• Saws in the Winter DLC invisible for Ameli Fixed in RM 3.95
• Voidwretch enemies in the Winter DLC are invisible for Ameli Fixed in RM 3.95

Adds icons to the map for each pickup you haven't collected. Works with Minimap and Archipelago!

Aprils Fools joke mod for 2025. Replaces (most) movement upgrades with additional mid-air jumps and forces the player to use the bolt caster.

Adds an option on the Grapple Settings menu to always see the (approximate) range of the grapple.

Makes Fern 50% smaller and 30% faster. Applies to all Fern saves, yes all of them.

Adds a minimap to the bottom-left of the screen.

Adds 43 additional save slots. There's also a plugin (More Saves: Arch Plugin) that shows the Archipelago slot name and port number.

When the game is opened, the window will be in the same spot as when it was closed. You must load a save for the window position to be saved.

Makes all NPCs grapple-able by the player.

Rusted Moss but there's a cool guy chasing you the whole time. RUN.

Lets you turn the speedrun timer on for normal mode and disable the timer when playing Fern speedrun mode using an icon on the pause menu.