Before the start of the two-year[23] development period, according to lead director Hidetaka Miyazaki, the studio had previously ruled out the following game to be a new installment to the King's Field series.[23] Instead SCEJ producer Takeshi Kajii described the game as a "spiritual successor" to King's Field,[24] where he stated "I am a fan of From Software, but naturally that also means there are parts of their games I'm not satisfied with, too," explaining the development choice as an opportunity to be more creative and potentially innovative, stating "If this was a new King's Field game, there would be areas we wouldn't be able to touch since they're part of the series; working together like this, we can try to make something really new."[24] Many elements from the King's Field series however can be found including the dark fantasy setting, role-playing elements and high difficulty. Besides King's Field, Kajii also mentioned fantasy-themed gamebooks such as Fighting Fantasy and Titan as inspiration for many location and character designs.[25] Other style of characters such as the "Adjudicator" boss taking some influences from pagan folklore, yet rather than exactly deriving from other designs, instead the design process involved "mixing a couple of images of primitive gods together" to create a "raw concept" with "an unusual and chaotic feel".[23]