Arknights: Endfield Will Launch on Steam October 15
The title will arrive on Steam alongside the Sanctuary of Ink update featuring new gameplay content.
Updated on Oct. 6, 2026 in eSports
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Publisher GRYPHLINE and developer Mountain Contour will launch Arknights: Endfield on Steam on October 15, 2026. This release coincides with the arrival of the Sanctuary of Ink update for the game, which is set on Talos-II.
Why it matters
The transition to Steam expands the accessibility of Arknights: Endfield to a broader PC gaming audience. Concurrent content updates aim to refresh the experience for both new and existing players.
The Sanctuary of Ink update introduces two new playable Operators, Si and Argent Flow, to the roster. These characters become available through successive recruitment events starting October 15, 2026.
The players
GRYPHLINE
GRYPHLINE is the publisher responsible for bringing Arknights: Endfield to a global audience.
Mountain Contour
Mountain Contour is the lead development studio behind the creation and maintenance of Arknights: Endfield.
The details
The Sanctuary of Ink update introduces an inn management system at the Yuanyuan Manor Inn and brings back the Contingency Contract mode via the Indigo Experimental Operation. Players explore new mechanics and areas by traveling through a landscape painting, supported by a soundtrack from composers Zhai Jinyan, Ludvig Forssell, 8:48, and Crywolf.
Timeline
The Sanctuary of Ink update and Steam release will launch on October 15, 2026.
Season Trajectory
The move to the Steam digital distribution platform aligns with industry trends of mobile-origin titles seeking greater PC market penetration. This expansion positions the franchise to compete more directly for a wider share of the global PC gaming demographic.
Players will access the Yuanyuan Manor Inn and new management mechanics starting on October 15, 2026. Those interested in the new operators, Si and Argent Flow, should prepare resources for the upcoming recruitment events.
The takeaway
The release of Arknights: Endfield on Steam marks a significant step for the title's reach among PC users. Players should monitor official channels for the exact time of the update and specific recruitment event details.
Further reading
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Source note: This article includes information reported by Gematsu.
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