The twenty-third letter of the Greek alphabet is psi. The 23rd Letter is a game of modern day psychics, government agencies, and corporate conspiracies.
Players take the role of psychics and agents.
They may be affiliated with one of the government projects, with one of the corporate powers, or with The Network, the loose affiliation of independent psychics. Setting The 23rd Letter posits a world in which government agencies sponsored research on psychic abilities during the Cold War and in which corporations built upon the initial government research and recruited psychics to further their business objectives and gain advantages over their corporate rivals. Outside the government and corporate institutions is The Network, the psychic underground. The general public does not believe in psychic abilities, but many in the public fear psychics. The government agencies and corporations offer psychics comfort and protection.