All roads lead to Rome, the greatest city of the Ancient World. Anything you desire is available in this city of over a million people. It's all here: goods from far off Parthia; pottery from Brittania; food from Egypt; vile tomes from Syria; and murderous cults from Africa. The mighty Empire is pressed on all sides by foes, both mundane and otherworldly. Forces within the Empire itself are growing in power, drawing on the most ancient of horrors to corrupt it from within. Welcome to Rome.Cthulhu Invictus is a new setting for Chaosium's Call of Cthulhu RPG. Players take on the roles of Roman citizens seeking to protect the Empire from the horrors of the Cthulhu Mythos and ancient myth. Cthulhu Invictus includes an adventure to jump start your Roman campaign, a large fold out map of the Roman empire, 41 creatures and entities from folklore and ancient mythology, 12 new cults, 21 new occupations, and much more. Requires the Call of Cthulhu rulebook for play.