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.