If there’s one thing you need above all else to make this game fun, it is a positive enthusiasm to make stuff up and create conflict and drama. at spark of life trumps all the rules and advice that anyone can give you on how to run a game. On its own, enthusiasm will not make you a great Keeper, but without it you will never be one. If anything in this book excites you, focus on that. Get fired up, get excited, and share that with your players so they feel it too  - Scott David Aniolowski 2006INTRODUCTIONThis book contains detailed information concerning the monstrous and frightening horrors of the Cthulhu Mythos. Drawn from the history of the Call of Cthulhu game, the entries herein present a diverse range of creatures and foul abominations to haunt and terrorize your games.Many favorites of the Mythos can be found within these pages—dimensional shamblers, Tindalosians, mi-go—aswell as plenty of less common creations—dark crawlers, ghoul hounds of Leng, blighted ones, and hell leeches, to name but a few. While not every Mythos monster or race to ever grace the pages of fiction and game are here, there are over 150 entries all told, comprising a significant representation of otherworldly beings, monsters from folklore, and beasts to bring fear and madness to investigators of the unknown.The alphabetical entries have been tweaked, revised, and updated for use in games. Further depth is provided for many monsters, including variant forms, alternative names, and special abilities. Combat profiles have been tweaked for clarity and effectiveness, with clear guidelines on the use of special attacks, maneuvers, and immunities.Each entry is designed to help Keepers bring these monsters to life at the gaming table and inspire the design of plots and scenarios. Advice for describing, using, and creating your own Mythos monsters is included, posing appropriate questions to assist and guide in this process, and hopefully making monster design a little easier to accomplish.