Galaxy Guide 4: Alien Races, Second Edition

Galaxy Guide 4: Alien Races, Second Edition is a supplement to Star Wars: The Roleplaying Game written by Troy Denning, revised for the second edition by Chuck Truett, and publised by West End Games in 1994. From an in-universe perspective, the book is supposed to be made up of excerpts from the Catalog of Intelligent Life in the Galaxy, Revised Edition by an Imperial sentientologist named Obo Rin, who was commissioned by Darth Vader to catalog the intelligent species of the galaxy.

While many of these species did appear in the original trilogy, some were invented for the game. The background information for several of the alien races who had appeared on screen was also invented for the game. However, many of the new species and backgrounds were used in later works in the Expanded Universe with little modification. The most common retcons necessary are those where a species described as having its first contact with the Galactic Empire are shown in later works to have some contact with the Galactic Republic.

From the publisher
Aliens! These oftimes strange and unique beings fill the Star Wars saga with variety and excitement.

Fighting alongside aliens with the Rebel Alliance? Engaged with them in something the Empire considers a less-than-legal activity? Need to know more about these aliens?

Alien Races provides the information you'll need on homeworlds, cultures, lifestyles and the behavior of over 30 alien species. Whether recognizable as bipeds, or insectoids with compound eyes, they make up a huge portion of the Galactic Empire.

Contents
The culture, biology, and game statistics of the following sentient species were detailed in Galaxy Guide 4:
 * Abyssin
 * Altorians (both the Avogwi and Nuiwit species)
 * Aqualish
 * Arcona
 * Barabel
 * Bilars
 * Bith
 * Brubbs
 * Chadra-Fan
 * Charon
 * Columi
 * Defel
 * Devaronians
 * Duinuogwuin, or Star Dragons
 * Duros
 * Fefze
 * Flakax
 * Givin
 * Gotal
 * Ho'Din
 * Hutts
 * Ishi Tib
 * Iyra
 * Jenet
 * Kitonak
 * Kubaz
 * Laboi
 * Mon Calamari
 * Ortolans
 * Ossan
 * Ranats
 * Ri'Dar
 * Rodians
 * Sedrians
 * Sic-Six
 * Squibs
 * Talz
 * Togorians
 * Ugors
 * Verpine
 * Whiphids
 * Xi'Dec