Astral Empires: Galaxy Master's Guide

Publisher's blurb: The Galaxy Master's Guide is a useful resource for GM-ing any science fiction RPG, with tips on creating adventures, tools for designing planets, creating atmosphere, and methods for offering character advancement. While grounded in the Astral Empires universe, the Galaxy Master's Guide is flexible enough to be adapted to multiple settings whether you choose to dabble in popular existing universes or create your own from scratch!