Arknights: Endfield version update ‘Sanctuary of Ink’ launches October 15 alongside Steam release

Step into a world of living ink.

Publisher GRYPHLINE and developer Mountain Contour will release the version update “Sanctuary of Ink” for free-to-play 3D RPG Arknights: Endfield on October 15 alongside its Steam release, the companies announced.

“Try using Si’s ‘Miracle Brush.’ With a gentle stroke across the gap between the cliffs, a bridge rises into the air,” said Mountain Contour narrative designer AJ in a press release. “Besides, the power of this brush goes far beyond simply opening the way. Every stroke made with it quietly changes the daily lives of the creatures within the painted world, bringing warmth and life back to this long-silent scroll.”

Here is an overview of the update, via GRYPHLINE:

About
The new chapter takes Endministrators inside Si’s Painting, where brushstrokes restore broken paths and a search for healing brings the Endministrator’s past into focus. Two playable Operators and new combat challenges join the adventure, while a countryside inn offers a change of pace between excursions. The Steam release brings GRYPHLINE’s 3D real-time strategy RPG to a new community of PC players, with cross-platform progression allowing existing players to continue their adventures on Talos-II.
Enter the World Inside Si’s Painting

Si, a Feranmut Proxy, welcomes the injured Endministrator to Yuanyuan Manor Inn to recover. Her home lies inside a landscape painting of her own creation. Strange phenomena in the surrounding mountains soon draw the pair into a new chapter of the main story, exploring a connection that stretches back a decade.
As players travel through the painted landscape, Si’s brush becomes their way forward: a stroke across a gap brings a bridge into being. Creatures formed from objects within the painting inhabit the world, though not all welcome visitors. A further trial awaits at the journey’s end.
Wield Living Ink and Lead a Mounted Charge
The Yuanyuan Manor Inn proprietor also brings her artistry to the battlefield as a playable Operator. Si can draw an Inksoul from an enemy, transferring damage and effects dealt to it back to the original enemy. Even when that enemy moves out of reach, players can continue dealing damage through the Inksoul or use a skill on it to interrupt an enemy’s charging attack. Her abilities also strengthen Cryo and Heat teammates.
Argent Flow, an old acquaintance of the Endministrator, combines sword and spear techniques with mounted charges on his warhorse, Nuli. During his ultimate, Argent Flow charges on Nuli before leaping into the air for a powerful finishing strike. A later narrative event takes players through paintings that reveal the past behind his calm, courteous manner.
Si and Argent Flow will become available through successive recruitment events during the update.
Rewrite the Rules of Combat
Contingency Contract returns with Indigo Experimental Operation, introducing selectable modifiers that pair powerful advantages with tactical restrictions. One dramatically boosts combo-skill damage but temporarily blocks further combo skills after every two casts, making timing crucial. For the first time, selected modifiers also give enemies additional attack patterns, creating new threats for players to plan around. Improvements informed by player feedback make challenge settings easier to select and reuse.
Make Yourself at Home in a Countryside Inn
Between adventures, players can try their hand at running a countryside inn in Yuanyuan’s Blazing Stoves. Grow crops, raise animals, and turn the farm’s produce into dishes for visiting guests, then put the earnings toward expanding the farm and inn. Different operating themes introduce additional recipes, giving aspiring innkeepers more to bring to the table. The Auto-Farmer lends a hand with sowing and harvesting, with access extending to Wuling’s farming area as the story progresses.
A New Musical Palette
Sanctuary of Ink’s Eastern fantasy setting also shapes its music, with color bass, afrobeat and UK garage bringing a lively rhythmic edge to the soundtrack. Contributors include Black Myth: Wukong composer Zhai Jinyan, Death Stranding composer Ludvig Forssell, Chinese avant-garde electronic band 8:48 and returning musician Crywolf.
Player-Experience Improvements
Alongside these additions, the update introduces saved equipment loadouts, more precise mouse targeting and adjustable priority for combo skills that trigger simultaneously. Players can also place field equipment directly using facilities or construction materials stored in the depot, without carrying them in their backpacks.

Arknights: Endfield is available now for PlayStation 5, PC via the official launcher and Epic Games Store, iOS via App Store, and Android via Google Play.

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