Arknights: Endfield Codes (February 2026) — All Working Redeem Codes & How to Use Them

A quick note about ENDFIELD4PC: different community lists describe the last items with slightly different names, but the main value is consistent—13,000 T-Creds plus additional upgrade materials.

Not every Endfield code you see online is still active. Some were tied to a short launch window and were never meant to last. That’s why you’ll often find “old but popular” codes copied across dozens of pages.

Two names that still show up a lot are ALLFIELD and RETURNOFALL. They were commonly listed as early promo codes, but they’re widely reported as expired now.

If you enter an expired code, Endfield won’t “partially accept” it. You’ll get an error and no rewards. That’s normal, and there’s no trick to revive an expired promo.

Still, this section is useful because it saves time. If you see these codes, you’ll know why they fail and can move on to working options without guessing.

Redeeming a code is done inside the game settings. The only catch is that some menus and features unlock as you move through the early game, so brand-new accounts may not see everything immediately.

Most players can access settings fairly early. But many “it didn’t work” complaints come from one thing: the mailbox. If you redeem a code but don’t claim it from Mail, it will feel like nothing happened.

Here’s the fastest path to the code input screen:

1. Open Menu
2. Go to Settings
3. Open Platform & Account
4. Select Exchange Code
5. Enter the code → Confirm
6. Open Mail and claim rewards

If you don’t see Mail yet, keep playing the early quests. Once the mailbox feature unlocks, redeemed items should appear there.

When a code fails, it’s usually for a simple reason. Don’t overthink it—run through the quick checks below and you’ll solve most issues in under a minute.

Start with typing. Endfield codes are short, but they’re strict. Check capitalization, remove spaces, and avoid copying extra characters when you paste. One invisible space at the end can trigger an “Invalid code” message.

Next, consider account limits. Most promo codes are intended as a one-time reward. If you already used it, you won’t be able to claim it again on the same account. That’s not a bug—just how these promos usually work.

Finally, there are two common “external” problems:

• Expired code: launch and announcement codes often have short lifetimes.
• Platform restriction: PC-only codes won’t work on mobile.

If the game accepted the code but you didn’t get items, go to Mail. And if Mail isn’t unlocked yet, progress a bit more in the story until your main menus are fully available.

You don’t need to hunt everywhere to find new codes. In most cases, Endfield codes drop in predictable places: official announcements, special programs, and big update moments.

The best time to check is right after a major post, a celebration, or a livestream recap. If a code is going to appear, it usually appears there first, and it’s often time-limited.

Be careful with shady “redemption” pages. Endfield codes are redeemed inside the game menu. If a site asks you to log in or download something to “activate” a code, that’s a strong warning sign.

Here are simple safety rules that keep you out of trouble:

• Don’t download “code generators” or “free Oroberyl tools.”
• Don’t enter your account info on random sites.
• Trust code lists that show clear status updates and verification dates.

Treat the working table as a snapshot. Codes can switch from active to expired quickly, especially if they were tied to a short promo window.

The best habit is simple: redeem a code as soon as you find it, then claim the mailbox rewards right away. It avoids confusion and makes it easier to track what you already received.

If a code stops working for you, it often means one of three things: it expired between checks, you already redeemed it, or you’re on the wrong platform for that specific code.