Advent Horizon is the definitive Science Fiction role playing game featuring 11 new classes, 9 races, and dozens of new skills. Fully compatible with the fifth edition of the world's most popular roleplaying game, Advent Horizon includes Open Gaming License rules for ships, vehicle combat, modern weapons, and more. In addition to 11 completely new, completely original Classes, Advent Horizon features a complete skill system design to allow you to feature and customize your character as you see fit. Your class only serves as a framework for you to customize your skills and abilities. At over 240 pages the Core Rulebook includes everything you need to play in the Arc, or create your own futuristic setting. - from the publisher's blurb