Call of Cthulhu Keeper Rulebook (7th Ed.)

Horror Roleplaying in the Worlds of H.P. Lovecraft

The
 Old Ones ruled the earth aeons before the rise of man. Traces of their
 cyclopean cities can still be found on remote islands, buried amid the
 shifting desert sands, and in the frozen wastes of the polar extremes.
 Originally they came to this world from the stars. They sleep now, some
 deep within the earth or beneath the sea. When the stars are right they
 shall again walk the earth.

Call of Cthulhu
is a tabletop roleplaying game based upon the worlds of H. P.
Lovecraft. It is a game of secrets, mysteries, and horror. Playing the
role of steadfast investigators, you travel to strange and dangerous
places, uncover foul plots, and stand against the terrors of the Cthulhu
Mythos. You encounter sanity-blasting entities, monsters, and insane
cultists. Within strange and forgotten tomes of lore you discover
revelations that man was not meant to know. You and your companions may
very well decide the fate of the world.

This book, the Keeper Rulebook,
contains the core rules, background, guidance, spells, and monsters of
the game. It is intended for use by the Keeper of Arcane Lore (the
Keeper) — that player who will present the adventure to the other
players. You must have at least one copy of this book to play Call of Cthulhu. The other players, the Investigators, should have one or more copies of the Investigator Handbook, containing expanded rules for character creation, skills, occupations, equipment, and more.

Call of Cthulhu, 7th edition, is backwards-compatible with all other available Chaosium titles.