Delta Green is a horror RPG based on the works of H.P. Lovecraft. Agents  of the secretive agency, Delta Green (which may or may not be an  illegal conspiracy inside the US government) investigate and neutralize  cosmic horror threats. Rules focus on the dangers and costs of facing  the unnatural, physically, mentally, and socially. Agents can perish in  an instant or watch their friends and families drift away as they spiral  deeper into the darkness.