A crossover event between The Promised Neverland and the mobile game Dragon Egg was held on May 22, 2020. A crossover with the mobile game Vivid Army was held from November 12–26, 2020. A crossover event with the video game Identity V was released on February 23, 2021. A second crossover event with Identity V was released on September 24, 2021. A crossover event, with the Japanese mobile game Jumputi Heroes, was released on March 15, 2021. A collaboration with the mobile game LINE POP2 was released on May 27, 2021.
