Unknown Armies (abbreviated UA) is an occult-themed role playing game by John Tynes and Greg Stolze and published by Atlas Games. Subtitled "A roleplaying game of power and consequences". The first edition was paperbound and published in 1998 (with the original subtitle of "A roleplaying game of transcendental horror and furious action"), the revised and expanded 2nd edition was published in a hardbound format in 2002 (with a second printing in 2004).