Xenologist's Guide (2019)

Publisher's blurb: No space opera setting would be complete without strange planets teeming with hungry or hostile aliens. Vicious predators, territorial mineral beings, carnivorous plants, sharp-toothed swarms, space eels... if you can imagine a dangerous alien creature, it's out there somewhere. The Xenologist's Guide is a compendium of more than 50 new adversaries for the Alternity Science Fiction Roleplaying Game from Sasquatch Game Studio. It includes adversaries from threat rating 1 to threat rating 12, with a variety of minons, champions, and bosses to provide challenges for missions of all levels. The Guide also includes a detailed creature design appendix to help you create your own alien adversaries.