Arknights: Endfield’s Sanctuary of Ink Drops October 15, 2026: Steam Launch, New Operators, and What Changes for Players

Arknights: Endfield players are about to get one of the biggest content drops in the game’s history, and it lands alongside a major platform milestone. The Sanctuary of Ink update arrives after scheduled maintenance on October 15, 2026, bringing with it the game’s Steam launch, two new 6-star operators, and a pile of limited-time activities. If you have been putting off clearing space on your device, now is the time: this version requires a full client re-download, not a simple patch.

Here is the short version before we dig into the details. The maintenance windows differ by server. Asia players go offline on 2026-10-15 from 06:00 to 12:00 (UTC+8), while Americas and Europe servers shut down a day earlier, on 2026-10-14 from 17:00 to 23:00 (UTC-5). Everyone gets 1800 Oroberyl in compensation, split across two mail messages: 900 for the update itself and another 900 for bug fixes. That compensation arrives only after the Mail feature is unlocked, so do not expect it in your inbox the moment servers come back.

Beyond the headline characters, the update also carries a new exploration zone called Wuling – Si’s Painting. Four 6-star weapons arrive as well: Jade Vessel (Greatsword), Lunar Calling (Sword), Long Heritage (Greatsword), and Complexed Industry (Sword). The patch also brings story content and a set of time-limited events, including Yuanyuan’s Blazing Stoves, the Spirit’s Restoration sign-in campaign, the Arena of Games Challenge, and the Contingency Contract. The full maintenance window runs from 06:00 to 12:00 (UTC+8) on October 15, 2026, for the Asia server, and from 17:00 to 23:00 (UTC-5) on October 14, 2026, for Americas and Europe.

All players receive 1,800 Oroberyl as compensation: 900 for the update and 900 for bug fixes. The compensation comes in two separate in-game mails, which are sent after the Mail feature is unlocked.

The update also introduces the