"We did purchase some art assets from Silicon Knights," Precursor Games CEO Paul Caporicci told Wired. "We were very happy to be able to put those assets created by the talented past employees to use." It was reported last October that as much as 40 percent of Silicon Knights had been working on a sequel to Eternal Darkness, which may explain the existence of said art assets.
Shadow of the Eternals is being built in CryEngine 3, Caporicci added – an important distinction to make considering the major issues Silicon Knights suffered after using Unreal Engine 3 and subsequently employing its own game engine. Though Nintendo owns the rights to Eternal Darkness and has patented the game's sanity mechanics, Caporicci said similar gameplay ideas can be safely implemented without breaking the law.