The game has just 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. Install in 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 the new directory for you. Otherwise, create a new subdirectory with the name of the mod, and put the files into it.