Ever since the first King's Field game, From Software has included a weapon called the Moonlight Sword in many of their game titles. The structure of both its exact name and appearance varies from title to title, but it has appeared in many of their games, including King's Field, Armored Core, Demon's and Dark Souls, and 3D Dot Game Heroes. They even named an RPG making program for PC based on King's Field called "Sword of Moonlight: King's Field Making Tool".