A Universe and World Creation Script for Mongoose Traveller 2nd Edition

- Tabletop RPGs, Programming

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The following is a Python script developed by yours truly to generate a sector according to the core rulebook of the Mongoose Traveller 2nd Edition tabletop RPG, exactly as described in the Universe and World Creation chapter. It is designed to describe worlds in human-readable format as much as possible, without any confusing abbreviations.

The script assumes that you are already familiar with the Universe and World Creation rules, and requires reference to them to configure the script to your liking and complete the creation process.

Special thanks to Matthew Sprange of Mongoose Publishing for giving me written permission to publish portions of his work in my script for non-commercial purposes! Note that due to this limited permission, I am releasing my code under a custom non-commercial license, which you can read in the header of the Python script.




First, install Python 3 if it is not already installed on your system.

Next, open MGT2WorldAndUniverseCreation.py in a text editor, and change the constants at the top of the file to the desired values. Each element in each array correspond to a specific subsector. Note that by default, each subsector has a normal density of systems, a 5% probability for systems to be located at a hot edge, a 5% probability for systems to be located at a cold edge, and a 10% probability for systems with an unusual atmosphere to be panthalassic.

Then, run:

python MGT2WorldAndUniverseCreation.py > Sector.txt

Finally, follow the instructions at the bottom of the generated text file to manually complete the process.


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