The Labyrinth: Delta Green RPG - Rules of Play says:
Born of the U.S. government’s 1928 raid on the degenerate coastal town of Innsmouth, Massachusetts, the covert agency known as Delta Green opposes the forces of darkness with honor but without glory. Delta Green agents fight to save humanity from unnatural horrors—often at a shattering personal cost.
Delta Green: The Labyrinth takes Delta Green agents beyond the beltway and deep into the fissures of America in the new millennium. From the loathsome servitors of the 1% to the hardscrabble faithful of the Rust Belt, from the abusive warrens of the Internet to the lonely chambers of every human heart, from the toxic legacy of the Cold War to the doomed idealists trapped in a world they cannot save, American life has entered a labyrinth of twisty passages all alike. And while there are many ways in, there is no way out.