Task Force 666 is a faction in the Apocalypse II: Left Behind storyline.
Task Force 666 was created by Joseph Deiss, the Anti-Christ. It is comprised of special agents from the Central Intelligence Agency. At one point, Deiss had heard about the operations that ex-Marines Jackson Falls, Andrew Six, Christopher Smith, and Joshua Thomas were doing for an ex-Group 936 operative named Dimitri Markhov, so he sent a squad of Task Force 666 soldiers to kill them. However, they failed and never returned.