Writing the story involved extensive research on a plethora of pseudo-scientific books.[1] Inspiration for the mythology in the game, such as the description of the city and the appearance of the metal orichalcum, was primarily drawn from Plato's dialogues Timaeus and Critias, and from Ignatius Loyola Donnelly's book Atlantis: The Antediluvian World that revived interest in the myth during the nineteenth century.[2] The magical properties of orichalcum and the Atlantean technology depicted in the game were partly adopted from Russian spiritualist Helena Blavatsky's publications on the force vril.[25] The giant colossus producing gods was based on a power-concentrating device called "firestone", formerly described by American psychic Edgar Cayce.[25]