Hârnmaster is a classic Pen&Paper RPG set in a world known as Kethira that roughly resembles Earth in the Dark Ages, while the main setting is a large Island called "Hârn", vaguely corresponding to early medieval British Isles.The "Hârnworld" in many ways is close or heavily inspired by J.R.R. Tolkien's Middle-Earth or Arda and within the Harnworld setting there are some allusions to Kethira being a world parralel or interlinked to Arda and Aman (possibly an intermediate stop on the Eldars travels to the blessed Lands).