Ace Combat
With the release of "Assault Horizon" in 2011, Project Aces created "Aces at War: A History", a special artbook detailing the content from "Ace Combat 04", "5", and "Zero" from an in-universe perspective, as well as production commentary. This was packaged with the special editions of "Assault Horizon" released in Japan. "Aces at War: A History" would later be updated and rereleased as part of a special edition of "Ace Combat 7: Skies Unknown".