This book contains detailed information concerning the bizarre and terrifying deities of the Cthulhu Mythos. Drawn from the history of the Call of Cthulhu game, the entries herein present a diverse range of Great Old Ones, Outer Gods, Elder Gods, Avatars, and Unique Beings. Many favorites of the Mythos find their way on to these pages—Azathoth, Great Cthulhu, Tsathoggua, Yog-Sothoth—as well as plenty of less common creations—Byatis, Idh-yaa, Rhan Tegoth, and Vorvadoss, to name but a few. While not every Mythos god to ever grace the pages of fiction and game are here, there are over 110 entries all told, comprising a significant representation of otherworldly beings to bring fear and madness to investigators of the unknown.For the sake of convenience, the terms “deity” and “god” are used throughout to refer to these immense Mythos entities. the alphabetical entries for all of the gods have been tweaked, revised, and updated, and all have significantly expanded information concerning their origins, agenda, and relationship to the Mythos in general. In addition, further depth is provided to the cults associated with each entity, the possible blessings bestowed upon such followers, and ideas for how these beings might be encountered or come to influence events in scenarios and campaigns.Each entry provides diverse information designed to bring these beings to life at the gaming table and inspire Keepers to design their own plots centered on these outlandish and awesome horrors. Advice for using and creating your own Mythos gods is included, encouraging Keepers to further expand the Mythos and build on the good work of others.The Cthulhu Mythos is unknowable to humanity. What scraps of information are known are drawn from rare andfragmentary texts, conversations with wizards and witches, and from life-altering exposure. us, each entry highlights the often-conflicting data concerning these beings, leaving each Keeper to draw their own conclusions…