Addons can be enabled or disabled in the settings.
Changing those settings requires a program restart.


Addons can use the following features (they don’t have to):

  • Custom Maps
  • Items and shops
  • Name generators
  • Units for the converter

Available Addons

RPG system addons are fanware and not official!

Addons for the following RPG systems are available:

Other addons:

Custom Addons

Custom addons can be installed by extracting the archive to the “Addons” directory. (By default /your/home/.gm-companion/addons)

Creating Addons

Currently creating addons is a bit of a hassle, but there are plans to create a seperate tool for easier addon creation in the future.

Getting started

Create a new folder in the “Addons” directory.
In your folder create a new file addon.ini.
Open the file in a text editor and paste the following:


Where My_Addon is the name of your addon and My_Addon_Description a short description of it.
Do not edit the addons_version number!

Now the GM-Companion should recognize your addon!


Addons can include links to Spotify playlists or albums.

  1. Create a file named spotify.json inside your folder.
  2. Copy the following template to the file:
     "data": [
             "folder": "The name of your addon or some other name",
             "playlists": [
                     "name": "Playlist 1",
                     "uri": "spotify:album:###############"
                     "name": "Playlist 2",
                     "uri": "spotify:album:###############"
             "albums": [
                     "name": "Album 1",
                     "uri": "spotify:album:###############"
                     "name": "Album 2",
                     "uri": "spotify:album:###############"

    Example Spotify URI: spotify:album:6bNTAa9CqIDv3pycA2eH8f

  3. Modify the file and add your albums and playlists.


Adding maps to your addon is simple:

Inside your folder create a new subfolder: maps
Now simply copy all the maps you want to include to that folder.

The maps tool will have them in a category with the name of your addon.


The easiest way to add units to your addon is by doing the following:

  1. Go to the following directory: /your/home/.gm-companion/units) and rename the file custom2.ini to something else.
  2. Open the GM-Companion and add all the units you want for your addon as custom units in the converter tool.
  3. Copy the new custom.ini file to your addon folder and rename it to units.ini. Now you can go back and change the name of custom2.ini back to custom.ini.

Unfortunately you are not done yet!
Open the units.ini file in a text editor.
The file will look something like this:

1\name=Test Unit 1
2\name=Test Unit 2

A unit consists of 3 parts: The name, refUnits and the category. You don’t want your units to be in the “Custom” category, so go ahead and change the name of the categories to something like “(MyAddon) Cool Units”.


  1. Create a new folder names in your addon folder.
  2. Create a new subfolder for each type of name, for example: Humans, Elves
  3. Inside these subfolders create (some) of the following files:
    • male.txt
    • female.txt
    • surname.txt
      If for example you don’t need surnames for your type then you don’t need to create surname.txt.
  4. Write all possible names in the respective files like this:
    male.txt: Bob,Frank,Paul
    Be sure to seperate the names with a “,” and do not leave a witespace behind it!

Items and Shops

For items and shops we have to do a similar workaround as with units.


  1. Go to the following directory: /your/home/.gm-companion/shop) (If you have set a custom shop path in the settings use your custom one) and rename CustomItems.items to CustomItems2.items or something else.
  2. Use the item editor to add all the items you want. When you are done move the new CustomItems.items file to your addon folder and rename the file to AddonItems.items.
  3. Go back and rename CustomItems2.items back to CustomItems.items.


You can simply create the shops in the shop editor and then move the .shop files to the shop folder inside your addon folder.