He has mentioned Tsutomu Nihei, Ryōji Minagawa, Kentaro Miura, Hideki Arai, and Tōru Mitsumine as artists he respects, and stated that the manga that had the biggest influence on him was ARMS.

He may be a hero to the common people, but among the leaders of humanity, fear of Eren’s mysterious powers threatens his continued survival. He may be a hero to the common people, but among the leaders of humanity, fear of Eren's mysterious powers threatens his continued survival. The first three spin-off manga were also licensed by Kodansha USA, who published the first volume of each between March and June 2014. Prequel Storyline: Attack on Titan: Before the Fall explores the world before the Titans' invasion, shedding light on the origins of the deadly creatures and the rise of the Survey Corps. Another game, Attack on Titan, for PlayStation 4, PlayStation 3, and PlayStation Vita, published by Koei Tecmo and developed by Omega Force, was announced at Gamescom 2015.

Still, the Survey Corps refuses to let him meet Eren–the other ingredient in the earth-shaking weapon– for fear the explosive duo will be impossible to control.

George Wada, the anime's producer, stated that the "Wall of Fear" was influenced by the isolated and enclosed nature of Japanese culture. Isayama estimated his basic monthly timeline as one week to storyboard and three weeks to actually draw the chapter.In the year 845, the first wall, Wall Maria, is breached by two new types of Titans, the Colossal Titan and the Armored Titan. A second part consisting of 12 episodes aired from January to April 2022, and the third and fourth parts aired in two specials; the first premiered in March 2023, and the second premiered in November 2023. After helping the Garrison to victory, retaking Trost District from the Titans, Eren awakens in a prison cell. With help from his friends, Eren fights and defeats Annie, who encases herself in crystal and is put in custody.