Delta Green: The Role-Playing Game - Black SitesHIDDEN HORRORS "It is absolutely necessary, for the peace and safety of mankind, that some of earth's dark, dead corners and unplumbed depths be let alone; lest sleeping abnormalities wake to resurgent life, and blasphemously surviving nightmares squirm and splash out of their black lairs to newer and wider conquests." H. P. Lovecraft, "At the Mountains of Madness." Eight Delta Green operations lock bystanders and Agents alike in unlit rooms with the