From publisher blurb:
Cosmic Characters and Amazing Aliens
The Alien Codex brings you an incredible array of sci-fi and space-themed playable races, iconic heroes, and a mountain of ready-to-play sci-fi NPCs, and that’s just the beginning! If your 5E campaign ventures into the dark tapestry of space, through gleaming dieselpunk spires, or has to defend a fantastic homeworld from alien invasion by elritch horrors from beyond the stars, this book is an amazing resource to populate an official 5th Edition setting, a universe of your own design, or a dedicated sci-fi saga like the Legendary Planet Adventure Path! In this nearly 300-page astro-adventuring accessory you’ll find:
Rules for over 50 species and how to use them in a sci-fi campaign, from classics like humans and elves to aquatic, bestial, and reptilian races, psychic species, animate plants, mechanical beings, and more.
Complete writeups for over three dozen fully detailed playable races, including racial traits, new character options, and more.
Over 100 feats, spells, magic items, class abilities, gear, archetypes, and other rules elements for you and your players to flesh out these alien species.
Over 200 ready-to-play stat blocks and templates from Challenge 1/8 to 24, from bloodthirsty farmers and okanta pilots to kraken breed klaven, hetzuud void sorcerers, auttaine legion commanders, and ultari techlords!
You also get nearly a dozen richly detailed iconic heroes, with vividly developed character histories and backgrounds!
Half a dozen appendices packed full of high-tech armor and weapons, radioactive aetherite rules, languages, and creature and rule indices!