Beier Software Development

Master Of Orion – Conquer the Stars


What is Master Of Orion?

Master of Orion is a turn-based, 4X (eXplore, eXpand, eXploit, eXterminate) computer strategy game. The player leads a race to dominate the galaxy through diplomacy, conquest, economics, and / or technology.

The latest reboot is called Conquer the Stars. Its official websites are:


In 2017 the game released the capability of customizing the game using MODS. This can be done in two ways:

  1. Download the Mods through the Steam workshop.
  2. Upload the modules to the GameplayData directory, typically one of the following:
    1. C:\Program Files (x86)\Steam\SteamApps\common\Master of Orion\MasterOfOrion_Data\StreamingAssets\GameplayData
    2. D:\SteamLibrary\steamapps\common\Master of Orion\MasterOfOrion_Data\StreamingAssets\GameplayData

The Steam Workshop method was having problems in 2017 with MODS that modify the Tech Tree or the Race Types, but they work fine with the second method. Since installing mods with the Steam Workshop is self-explanatory, this site will focus on and supply mods for the second method.

Instructions for installing into the MODS directory:

  1. Download a MOD as a YAML or compressed files.
  2. Copy or extract the files into your Documents\Master Of Orion\Mods directory. The compressed file may already contain a new sub directory, in which case you can extract to the mods directory itself and it will create new directory for you. Otherwise, create a new subdirectory with the name of the mod, and put the files into it.


Battlestar Galactica’ish Download
Star Trek’ish Download
T-Best Uber Unbalanced Mega Mod Download
Lots Of Planets Download
Extreme Races Download
Very Different Races Download
Bringing Sexy Back / Less Frustrating Download
Stronger Smarter Ships and Bases Download
Productive New Colony, Volcanic Terraforming & Jump Gates! Download
Warp Speed Download