Mod Creation/Enabling DevTools for the Steam and Epic Clients

This page was last updated for (v0.20).

Disclaimer: It is highly recommended to BACKUP YOUR SAVE before running any scripts or extensions.

Disclaimer: Do not run code you can not understand or do not trust. Malicious code could be included in any script and extension.

Before You Begin

It's highly recommended before doing anything to

1. back up your save by exporting or downloading the save file.
2. read all instructions before following them.
3. verify the code is not malicious.

Steam Console and Scripts

How to use console commands, scripts, and extensions on Steam.

1. Setup

You only have to do this once.

1. Download Melvor Idle on Steam, and find the installation directory. e.g. [...]/steamapps/common/Melvor Idle
2. Download the 0.49.2 version of NW.js SDK. The version might change in the future, but you need the specific one listed.
• 64bit Windows: https://dl.nwjs.io/v0.49.2/nwjs-sdk-v0.49.2-win-x64.zip
• 64bit Linux: https://dl.nwjs.io/v0.49.2/nwjs-sdk-v0.49.2-linux-x64.tar.gz
• Others: https://dl.nwjs.io/
3. Download the scripts and extensions you want to use.
• Download from the script manager website. e.g. GreasyFork
• Download from the extension's browser store page.
• Download the source from the extension's repository. e.g.
• Combat Sim: https://github.com/visua0/Melvor-Idle-Combat-Simulator-Reloaded/releases
• SEMI: https://gitlab.com/aldousWatts/SEMI/-/archive/main/SEMI-main.zip
4. Extract all zipped files.
5. Place the contents of the nwjs-sdk* directory in the Melvor Idle installation directory.
6. Place the icons, styles, and source (i.e. scripts or sources) directories of the extracted extensions in the Melvor Idle installation directory.

2.a. Loading Scripts

Loading scripts must be run every time the game is opened on Steam.

1. Open the game and load a character.
2. Open the dev tools console (F12).
3. Set the context of the console to game.
• The top left of the console has a dropdown: change it from top to game (steam.melvoridle.com). After doing this, you can use the console.
4. Load the scripts and extensions you placed in the installation directory before.
• You can load SEMI like this:

require('fs').readFile('scripts/SEMI.js', 'utf8', (err, data) => {eval(data);})
$(document.head).append(`<link rel="stylesheet" href="${chrome.runtime.getURL('styles/semi.css')}">`)

• You can load the Combat Simulator like this:

require('fs').readFile('sources/contentScript.js', 'utf8', (err, data) => {eval(data);})
$(document.head).append(`<link rel="stylesheet" href="${chrome.runtime.getURL('styles/mainStyle.css')}">`)

• You can load user scripts like this, by changing the file name:

require('fs').readFile('relativePathToMyReallyCoolScript.js', 'utf8', (err, data) => {eval(data);})

2.b. Alternate Variation

The following variant results in a cleaner directory without potential file name clashes. Note that the above does not clash for Combat Simulator + SEMI at the moment.

Additional Setup

Do all the normal steps 1-5 of the Setup section then follow the below instructions.

1. Create a directory Extensions in the Melvor Idle installation directory.
2. Make new directories for the extensions and scripts. e.g.

Extensions/
  Greasy Fork/
    Melvor Completion Log Helper.js
    Melvor Idle - Timestamped Saves.js
  Melvor-ETA/
    time-remaining.js
  MICS-steam/
    icons/
    sources/
    styles/
  scripts/
    nameOfMyReallyCoolScript.js
  SEMI-steam/
    icons/
    scripts/
    styles/

3. Place the icons, styles, and source (i.e. scripts or sources) directories of the extracted extensions in the respective created directories.

Alternate Variation Loading Scripts

If you followed the alternate variation setup steps, you will have to load scripts slightly differently.

1. Open the game and load a character.
2. Open the dev tools console (F12).
3. Set the context of the console to game.
• The top left of the console has a dropdown: change it from top to game (steam.melvoridle.com). After doing this, you can use the console.
4. Load the scripts and extensions you placed in the installation directory before.

[
    // own
    'Extensions/scripts/nameOfMyReallyCoolScript.js',
    'Extensions/Melvor-ETA/time-remaining.js',

    // extensions
    // other than the main script, extensions typically also require the insertion of a css file
    'Extensions/MICS-steam/sources/contentScript.js',
    //'Extensions/SEMI-steam/scripts/SEMI.js',

    // Greasy Fork user scripts
    'Extensions/Greasy Fork/Melvor Completion Log Helper.js',
    'Extensions/Greasy Fork/Melvor Idle - Timestamped Saves.js',
].forEach(pts => require('fs').readFile(pts, 'utf8', (err, data) => {eval(data);}));

// Extension css
[
    'Extensions/MICS-steam/styles/mainStyle.css',
    //'Extensions/SEMI-steam/styles/semi.css',
].forEach(cssFile => $(document.head).append(`<link rel="stylesheet" href="${chrome.runtime.getURL(cssFile)}">`));

5. If you are using extensions, edit the main extension script so all source files and icons can be found.
• e.g. edit the paths in contentScript.js for Combat Simulator and SEMI.js for SEMI

Combat Simulator:
 -icons/ -> Extensions/MICS-steam/icons/
 -sources/ -> Extensions/MICS-steam/sources/
SEMI:
 -icons/ -> Extensions/SEMI-steam/icons/
 -scripts/ -> Extensions/SEMI-steam/scripts/

Auto-loading Scripts in Steam

1. Create a .js file in the Melvor Idle directory.
2. Set the contents of the .js file
• The 15000 is just to give the game 15 seconds to get up and running, it doesn't seem to matter if it fires on the character screen or once you load a character.

setTimeout(function(){ 
     /*insert all of the commands you would normally put in the console to load your scripts*/
}, 15000);

3. Add the following code to the parameters of package.json

"inject_js_end": "pathToYourFile/yourFileName.js"

Melvor Idle version v1.3.1 (Released: 30th October 2024)
Error creating thumbnail: File missing Combat: Error creating thumbnail: File missing Attack • Error creating thumbnail: File missing Strength • Error creating thumbnail: File missing Defence • Error creating thumbnail: File missing Hitpoints • Error creating thumbnail: File missing Ranged • Error creating thumbnail: File missing Magic • Error creating thumbnail: File missing Prayer • Error creating thumbnail: File missing Slayer • Error creating thumbnail: File missing Corruption
Skills: Error creating thumbnail: File missing Farming • Error creating thumbnail: File missing Township • Error creating thumbnail: File missing Woodcutting • Error creating thumbnail: File missing Fishing • Error creating thumbnail: File missing Firemaking • Error creating thumbnail: File missing Cooking • Error creating thumbnail: File missing Mining • Error creating thumbnail: File missing Smithing • Error creating thumbnail: File missing Thieving • Error creating thumbnail: File missing Fletching • Error creating thumbnail: File missing Crafting • Error creating thumbnail: File missing Runecrafting • Error creating thumbnail: File missing Herblore • Error creating thumbnail: File missing Agility • Error creating thumbnail: File missing Summoning • Error creating thumbnail: File missing Astrology • Error creating thumbnail: File missing Alternative Magic • Error creating thumbnail: File missing Cartography • Error creating thumbnail: File missing Archaeology • Error creating thumbnail: File missing Harvesting
Other: Error creating thumbnail: File missing Beginners Guide • Guides • Error creating thumbnail: File missing Bank • Error creating thumbnail: File missing Combat • Error creating thumbnail: File missing Mastery • Error creating thumbnail: File missing Money Making • Error creating thumbnail: File missing Shop • Easter Eggs • Pets • Error creating thumbnail: File missing Golbin Raid • Error creating thumbnail: File missing Full Version • Throne of the Herald • Atlas of Discovery • Error creating thumbnail: File missing Into the Abyss
Reference Tables: Items, Equipment, Experience Table, Upgrading Items, Combat Areas, Slayer Areas, Dungeons, Strongholds, The Abyss, Monsters