1. Install the app
Download it for Windows, Linux or Steam Deck. No commands to type. How to install →

1. Install the app
Download it for Windows, Linux or Steam Deck. No commands to type. How to install →
2. Pick some mods
Browse mods shared by the community and install one with a single click. Using the app →
3. Press Launch Modded
The game starts through Steam with your mods switched on.
4. Back to normal any time
When you quit, RSMM puts the original game files back. Launch Vanilla plays without mods.
In your browser
Change items, talents and abilities with the web editor. Nothing to install.
With the modding tools
Change looks, numbers, text and add new content with a short text file. Add Lua scripts for new gameplay.
RSMM is free and open source. If you’d like to support it, you can buy the developer a coffee on Ko-fi.