An essential play aid for those running games of Call of Cthulhu, this four-panel Keeper Screen collects and summarizes important rules, statistics, and charts to assist the Keeper when running games. Also included are two scenarios set in Lovecraft Country during the 1920s ("Blackwater Creek" and "Missed Dues"), plus twelve ready to play, pre-generated investigators and full-color maps of Lovecraft Country, the World of Cthulhu, and Arkham Environs.