An artbook collection of all of the game's assets was slated to be released in May 2018, with the release date delayed to September 30, 2018. The artbook collection contains unit art (including unreleased units!), story art, concept art, sketches, story scripts, and other related art and text. It is divided into two books, an illustration collection with 370 pages (the delay added an additional 34 pages), and a scenario collection with 340 pages. A foil storage case for the books is also included.
The artbook was available with Movic (requires a proxy outside of Japan) and CD Japan with a print to order release for 7,800 yen (approximately $70 USD). Copies of the artbook were extremely limited on top of being print to order, resulting in many preorders being cancelled.