Opero 77

Opero 77 is a 3★ weapon in Arknights: Endfield. It is a Polearm-type weapon.

Opero 77 was released on January 22, 2026. They were introduced alongside Quencher, Exemplar, Jiminy 12, Hypernova Auto, Fluorescent Roc, Wild Wanderer, Stanza of Memorials, OBJ Arts Identifier, Monaihe, Opus: Etch Figure, Oblivion, Dreams of the Starry Beach, Detonation Unit, Delivery Guaranteed, Chivalric Virtues, Tarr 11, Wave Tide, Contingent Measure, OBJ Edge of Lightness, Fortmaker, Finchaser 3.0, Aspirant, White Night Nova, Umbral Torch, Thermite Cutter, Rapid Ascent, Never Rest, Grand Vision, Forgeborn Scathe, Eminent Repute, Peco 5, Long Road, Howling Guard, Rational Farewell, Opus: The Living, OBJ Velocitous, Wedge, Navigator, Clannibal, Artzy Tyrannical, Pathfinder's Beacon, Aggeloslayer, OBJ Razorhorn, Cohesive Traction, Chimeric Justice, Valiant, Mountain Bearer, JET, Darhoff 7, Industry 0.1, Seeker of Dark Lung, OBJ Heavy Burden, Finishing Call, Ancient Canal, Thunderberge, Sundered Prince, Khravengger, Former Finery, suggesting they were part of the same content update. Opero 77 has been part of Arknights: Endfield since near its launch.