Cthulhu meets “The X-Files”
Delta Green is a contemporary era setting for the Call of Cthulhu role-playing game. The covert agency known as Delta Green opposes the forces of darkness with honour but without glory. Delta Green agents fight to save humanity from unnatural horrors — often at a shattering personal cost. In the game the players are those agents.
Delta Green agents fight to save human lives and sanity from threats beyond space and time.
Delta Green agents work undercover through other U.S. government agencies, recruiting across a wide range including the FBI, ATF, CIA, CDC, DEA and the U.S. Military. It appears to have "gone rogue" somewhere between the 1960s and the 1980s, following a disastrous operation in Cambodia and a "deal" struck by Reagan-era rivals in Majestic-12, ostensibly with "Greys". Delta Green must not only contain incursions from creatures from the Cthulhu Mythos, but also secret conspiracies and rogue organizations that seek to weaponize its powers.
More information can be found at: Delta Green Games and Fiction - Delta Green (delta-green.com)