Read on November 6, 2026 in Gryphline’s official news pages and its Steam announcements. A code is listed only with the source and the dates its announcement gives. No code was redeemed in the game for this guide.

This guide lists the redemption codes found in official announcements for Arknights: Endfield. It keeps expired codes, ended events and rewards sent by in-game mail apart, because they are not the same thing. A successful redemption would confirm a code only for one account, one server and one date, so this guide does not say that a code works.

For an overview of the game, see our Arknights: Endfield guide.

Codes from official announcements

ENDFIELDSTEAM

• Source: Steam announcement “Steam Wishlist Milestone Reached”, October 7, 2026.
• Redemption window, Asia Server: October 6, 2026 at 19:30 to November 25, 2026 at 23:59 (UTC+8).
• Redemption window, Americas / Europe Server: October 6, 2026 at 06:30 to November 25, 2026 at 10:59 (UTC-5).
• Rewards listed: T-Creds ×8,000; Elementary Cognitive Carrier ×2; Arms INSP Set ×2; Special Commemorative Portrait Frame ×1.
• Status on November 6, 2026: official code, window announced as open on the verification date, redemption not tested.

Code issued by the WhatsApp and Messenger subscription event

• Source: Gryphline news 1329, August 10, 2026.
• Redemption window: ended September 9, 2026 (Asia Server 23:59 UTC+8; Americas / Europe Server 10:59 UTC-5).
• Rewards listed: Oroberyl ×100.
• Status on November 6, 2026: expired. The code was issued to each subscriber and is not published in the notice.

The announced window for ENDFIELDSTEAM ends on November 25, 2026. This section reflects the announcements read on November 6, 2026. It is not updated by itself, so after that date the entry may be out of date until the article is revised.

What the announcement says about ENDFIELDSTEAM

The Steam post of October 7, 2026 announces that the game launches on Steam on October 15. It says the final reward of a wishlist milestone event, a commemorative portrait frame, and the rewards of the earlier phases can now be unlocked, and it gives the code, the reward list and the two redemption windows above.

The post does not say whether the code is limited to one use per account, to one server or to one platform. It does not name a menu path or give any other condition. This guide draws no restriction from the name of the code.

How to redeem a code

The August 2026 notice (news 1329) tells players to click the menu button in the top-right corner of the game screen or press ESC, then open the exchange screen, enter the code and click Exchange. The same page names that screen in two ways:

• Notice body: Protocol Synchronizer > Settings > Platform & Account > Exchange Code
• FAQ in the same notice: Protocol Synchronizer > Platform & Account > Exchange Code

Both paths are given as the sources write them. This guide did not test either, and the October 7 Steam post gives no path. Menu names can differ between versions, so use what your game shows.

Expired codes, ended events and rewards by mail

Expired code. The code of the WhatsApp and Messenger subscription event expired on September 9, 2026. The notice says an expired code can no longer be redeemed and that a forgotten code cannot be replaced.

Ended events.

• The WhatsApp and Messenger subscription event ran from August 10, 2026 at 13:00 to September 9, 2026 at 23:59 (UTC+8).
• The Steam wishlist milestone event was announced on August 13, 2026 with a counting period that ran until the launch on Steam. Its milestones were T-Creds ×8,000 at 30,000, Elementary Cognitive Carrier ×2 at 100,000, Arms INSP Set ×2 at 200,000 and a Special Commemorative Portrait Frame at 300,000. The code above comes from the October 7 post, not from this one.
• The Steam Pioneer Test announced a recruitment period from August 26, 2026 at 12:00 to September 10, 2026 at 13:00 (UTC+8). The post lists playtest rewards claimable after logging in for 5 days and says they would be sent after the Steam launch. It does not say how they are delivered.

Rewards sent by in-game mail. These are not codes.

• WhatsApp account linking (October 16, 2026, news 0743): Oroberyl ×100 sent to the in-game mail of the linked account. The notice says the Prologue must be finished and the Mail feature unlocked, that the mail is valid for 30 days, and that one game account can receive the reward once. It names the Asia Server and the Americas / Europe Server. The text read for this guide gives no end date for the feature.
• Update and bug fix compensation (October 15, 2026): Oroberyl ×900 for the update and maintenance and Oroberyl ×900 for a bug fix, sent in two separate mails to characters created before the update. The mails expire at the next version update and maintenance. This applies to that update only.

You do not enter anything for a mailed reward. It is not an exchange code.

The screenshot above shows an Event Center screen from the game. This guide has not checked how rewards on that screen are claimed. A reward shown there is not a redemption code unless an official notice says so.

How to check a code before you enter it

• Find the source. Use a code only if an official Gryphline announcement or its Steam announcement gives it, with the dates of its window.
• Read the dates and the server. The notices give separate windows and time zones for the Asia Server (UTC+8) and the Americas / Europe Server (UTC-5).
• Read that announcement’s own rules. The August notice limited the reward to one claim per game account. Another announcement can set other rules, or none, as the Steam post does.
• Do not guess limits from a name. A code’s name does not tell you who can use it.

If an exchange does not work

Check the window dates for your server, then check that you entered the code exactly as the announcement shows it. Gryphline’s notices of August and October 2026 give a customer support email for questions about those events. This guide does not document what to include in a message.

What this guide does not cover

• Whether any code works in the game. No code was redeemed for this guide.
• Codes from lists that do not point to an official announcement.
• Events, codes or mail rewards that the notices read for this guide do not mention.
• Any change after the announcements read on November 6, 2026.