Rifts Lone Star outlines the Coalition State of Lone Star and its top-secret, mutant animal facility - the Lone Star Complex. Maps and a brief geographical overview of the old state of Texas are included, along with a history and description of the complex itself. In addition to Dog Boys, the complex creates the Ursa-Warrior mutant bear, Kill Cats, Monkey Boys and the Xiticix Killer. Notable CS characters found the complex include Desmond Bradford, General Loni Kashbrook and Dr. Frederick Alexander.

The Pecos Empire and its major personalities are also included in this 176-pages book along with information on the Kingdom of Worth, the Haunted Ruins of Dallas and Houstown.