HAVE YOU SEEN THE YELLOW SIGN? The King in Yellow: A simple play twists thoughts and perceptions, twists reality itself. Its beautiful, poisonous words awaken realizations that make the audience long for the peace of ignorance. It first touched the stage in the dying light of the 19th century and has arisen again and again to bring to human souls the bitter satisfaction of despair. STATIC Protocol is a full-color sourcebook for Delta Green, the role-playing game of Lovecraftian horror and conspiracy.