Free resources in a survival game are never something to sleep on. Once Human hands out Starchrom, Energy Links, Activators, and exclusive cosmetics through promo codes, and the only catch is that most of them expire without warning. This guide compiles every active code for April 2026, confirms what each one actually rewards, and walks you through the redemption process so nothing gets wasted.
What are the active Once Human codes right now?
As of early April 2026, three codes are confirmed working globally. Redeem these before they disappear:
Code
Rewards
2026SFOH
1,000x Starchrom, 1x Butterfly's Emissary Crate II, 1x [100 off 500] Shop Coupon
S3STREAMER
1,000x Starchrom, 1x Butterfly Emissary Crate II, 1x [100 off 500] Shop Coupon
STARLIGHTOH
Random Christmas Deviation
These three are the ones worth prioritizing. The 2026SFOH and S3STREAMER codes are particularly valuable since each delivers 1,000 Starchrom plus a Crate and a shop discount voucher in a single redemption.
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Codes are case-sensitive. Type them manually rather than pasting from a source that might include invisible spaces or formatting characters.
The following codes are tied to specific content creators or may be restricted to certain server regions. They tend to stick around longer than global event codes, so they're worth trying even if you missed the initial drop. Only one code from the OnceHuman creator series can be redeemed per account, so pick the one with the best reward:
OH000007 – 300x Energy Link, 2x Activator
OnceHumanTBG – 300x Energy Link, 1x Adrenaline Shot, 2x Activator
OnceHumanIGP – 300x Energy Link, 1x Adrenaline Shot, 2x Activator
OnceHumanLG – 300x Energy Link, 1x Adrenaline Shot, 2x Activator
OnceHumanJRpt – 300x Energy Link, 1x Adrenaline Shot, 2x Activator
fcnx8nhxj7 – 300x Energy Link, 1x Adrenaline Shot, 2x Activator
hyd7my66rt – 200x Energy Link, 2x Sanity Gummy
ONCEHUMANKFBT – 300x Energy Link, 2x Activator
Since the OnceHuman creator codes all give the same core bundle (Energy Links plus Activators), the ones that also include an Adrenaline Shot are the better pick. Go with OnceHumanTBG, OnceHumanIGP, OnceHumanLG, OnceHumanJRpt, or fcnx8nhxj7 over the base OH000007 if you haven't redeemed any of them yet.
Starchrom reward in mailbox
How do you redeem codes in Once Human?
The redemption process differs slightly depending on where you are in the game. You need to have progressed past the Eve of Evolution tutorial quest before the shop tab becomes accessible. Once that's done, the steps are straightforward:
Launch Once Human and reach the main lobby.
Select your server and room.
Open the Settings icon in the top-right corner of the main screen.
Navigate to Account in the left panel, then select Redeem Code.
Type your code exactly as listed (case-sensitive) and press Confirm.
Check your in-game Mail to collect the rewards.
danger
Rewards land in your Mail inbox, not directly in your backpack. If you redeem a code and nothing appears immediately, open your Mail before assuming the code failed.
Why isn't my Once Human code working?
There are four common reasons a code fails, and most of them are fixable:
Typo or case error – Once Human codes are case-sensitive. A lowercase letter where an uppercase is expected will invalidate the code entirely.
Code expired – Most promotional codes have a hard expiration date and stop working without any in-game notification.
Region restriction – Some codes only function on specific servers. If a global code fails, it may be locked to a different region than your account.
Already redeemed – Each code can only be used once per account. Attempting to reuse one returns an "already redeemed" error.
Creator code conflict – All codes beginning with "OnceHuman" count as the same code type. You can only redeem one of them total per account.
If none of the above apply, wait a few minutes and log back in. Server delays occasionally cause a slow response on the redemption confirmation.
What do Once Human codes actually reward?
Understanding what each currency does makes it easier to prioritize which codes to grab first:
Starchrom – The primary premium currency used for gacha pulls and shop purchases. The 1,000 Starchrom codes are among the most valuable available.
Energy Link – A core crafting and progression resource. Useful at all stages of the game.
Activator – Used to activate Deviants, the game's collectible companions that grant passive bonuses.
Butterfly's Emissary Crate – A loot box that contains random items, often including cosmetics or rare materials.
Mitsuko's Mark – A resource tied to specific upgrade paths.
Adrenaline Shot – A consumable recovery item.
Sanity Gummy – Restores Sanity, which depletes when you eat contaminated food or drink dirty water (a core survival mechanic in Once Human).
Shop Coupon [100 off 500] – Reduces a 500-unit shop purchase by 100 units.
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Stardust from the alien substance called Stardust affects both living beings and the environment in Once Human. Sanity items like the Sanity Gummy become more valuable the deeper into contaminated zones you push.
How do you find new Once Human codes?
Codes drop through a few reliable channels. Based on patterns observed over time:
Once Human's official Twitter/X account (@OnceHuman_) – The most direct source. New codes appear during version updates, maintenance windows, and seasonal events.
Official Discord and Steam forums – Community managers sometimes drop codes here during livestream events or community milestones.
Reddit (r/OnceHumanOfficial) – Players share codes quickly, and community-organized events like the Elemental Encounters speedrun challenge (which ran February 26 to March 11) often come with reward codes.
Twitch drop events – Once Human has run Twitch watching campaigns where viewing official streams for 1, 2, or 4 hours unlocks in-game items like the Sticker Robot, Popular Inkstone Round Table, and Light of Truth Eyewear respectively.
Official code announcement post
Expired codes: what no longer works
Keeping a record of expired codes helps confirm whether a code you found on an older page is still worth trying. These are confirmed expired as of April 2026:
THANKYOU – 2,000 Starchrom
RAIDZONE – 2,000 Starchrom
RAIDZONEDROPS – 100 Mitsuko's Marks, 2x Butterfly Emissary Crates, 1x Paint: Lily of the Valley Unfurl
