Arknights is a mobile tower defense game developed by Hypergryph. Players take on the role of a leader in a dystopian world plagued by a mysterious infection called Originium. The game features a unique blend of strategy and role-playing elements, where players deploy various characters, known as Operators, to fend off waves of enemies. In Arknights, each Operator has distinct abilities and roles, such as Defenders, Snipers, and Medics. Players must strategically place these Operators on a grid-based map to optimize their defenses and complete missions. The game also includes a rich storyline, engaging artwork, and a gacha system for acquiring new Operators.