Cosmic terror infects the U.S. government and the companies that profit from it. Delta Green: The Complex offers 19 new dossiers for federal agencies and important contractors to enhance your Delta Green campaign. Each dossier describes the entitys budget, operatives, organizational structure and history, mandate, areas of friction with other agencies, suggested professions for Delta Green agents, and what its like to work there.

The Complex gives deep and playable details for the ATF, Booz Allen Hamilton, the Coast Guard, Consolidated Analysis Center, Constellis Group, Customs and Border Protection, DARPA, the Defense Intelligence Agency, FEMA, Lockheed Martin, NASA, the National Nuclear Security Administration, the National Counterterrorism Center, the National Geospatial Intelligence Agency, the National Reconnaissance Office, the NSA, the Office of Naval Intelligence, the RAND Corporation, and the Secret Service. The Complex is playable with Delta Green: The Role-Playing Game,