This 148x210mm (standard A5 size) hardcover book will immerse you in this not so fantasy Middle Ages teeming with hideous aliens. The Corebook contains: • A vast and rich game setting, filled with letters written by the many members of the Ordo Sideralis scattered throughout Medieval Europe, as well as some ancient letters that reveal the origins of the Ordo. • All the rules for playing MedievAlien, including how to create your knights, the conflict resolution system, and the investigation rules. • An entire chapter dedicated to downtime and fortress expansion, complete with rules for leveling up your characters using the hard-earned experience points you’ve accumulated, as well as rules for creating the deadly Xeno Opus—the ultimate gears for hunting Aliens. • A haunting bestiary brimming with ideas for Alien Archetypes, essential for bringing to life the boss battles that mark the climax of every Quest.