Arknights is a free-to-play tactical RPG/tower defense mobile game developed by Chinese developer Hypergryph. It was released in China on 1 May 2019, in other countries on 16 January 2020 and in Taiwan on 29 June 2020. Arknights is available on Android and iOS platforms and features gacha game mechanics. A spin-off game, Arknights: Endfield, was announced for PC and mobile devices in March 2022. An anime television series adaptation by Yostar Pictures premiered in October 2022.