 The Xbox Live Arcade Game "Shadow Complex" was announced by Donald Mustard to be a tie-in to the second installment of Orson Scott Card's Empire Trilogy and is a prequel to the Empire novel that is developed by ChAIR.The rights to a film version of "Empire" have been acquired by Joel Silver and Warner Bros.

At the video game convention E3 it was revealed by Donald Mustard of Chair Entertainment that the Xbox Live Arcade game "Shadow Complex" will serve as a tie-in to the second installment of the Empire trilogy, "Hidden Empire", which was released on December 22, 2009.In a developer's diary for the video game Card stated that the game serves as a prequel to the original book.