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Arknights is a tower defense mobile game developed by Hypergryph.
You can obtain new operators in Arknights through recruitment, gacha system, or events.
The different classes of operators in Arknights include Vanguard, Guard, Defender, Specialist, Sniper, Caster, Medic, Supporter, and Summoner.
No, Arknights requires an internet connection to play.
Arknights regularly introduces new events, typically every few weeks.