Mitosis Codes (October 2026): Official Roblox Codes
Scope: Codes printed in official Mitosis sources (Roblox game description, Fauna Studio group, official update events), checked on 22 October 2026.
Key points
- The official Mitosis description lists two codes: Update2 and HALLOWEEN.
- The description says to redeem codes in the shop; it does not state the rewards.
- Fan sites list other strings, but none of them appear in an official source checked on 22 October 2026.
- Type each code with the same capitalization shown here.
On this page
The official Mitosis codes for October 2026 are Update2 and HALLOWEEN. Both are printed in the Roblox game description by Fauna Studio, under the line "Redeem codes in the shop for free rewards!" The description does not say what either code gives, so this page lists them without a reward rather than guessing one.
Which Mitosis codes are officially listed right now?
| Code | Reward | Status | Where it is published |
|---|---|---|---|
| Update2 | Not stated by the developer | Listed on 22 October 2026 | Official game description |
| HALLOWEEN | Not stated by the developer | Listed on 22 October 2026 | Official game description |
Copy the Mitosis codes exactly. The description writes Update2 with a capital U and lowercase letters, and HALLOWEEN in capitals. Whether the redemption box ignores capitalization is not stated anywhere official, so matching the printed form is the safe option.
The names line up with the official Mitosis update log: "UPDATE 2" is the subtitle of the Halloween Update event on 18 October 2026. The update history has both events.
Where do you redeem codes in Mitosis?
The developer's own instruction is to redeem Mitosis codes in the shop. A practical sequence:
- Join Mitosis on Roblox (the Fauna Studio game, universe 10768689412).
- Open the shop.
- Find the code entry field there.
- Type the code exactly as shown above and confirm.
The official text does not describe the button layout of the shop, so steps 2 and 3 stay general. The same shop is where crates are opened, according to the crate descriptions on the Robux shop page.
Why are other codes missing from this list?
On 22 October 2026, one fan site (mitosis.wiki) listed two further strings as "reported active", with its own reward claims and a check date of 17 October. Neither string appears in the official Mitosis description, the Fauna Studio group description, or the two official update events. Another fan site (mitosiswiki.wiki) listed only Update2 and HALLOWEEN. The sources disagree, and only the official one is used here.
If a code leaves the official description, it will move to the expired table below with the date it was noticed instead of being deleted.
Are there any expired Mitosis codes?
| Code | Status | Noticed |
|---|---|---|
| None recorded | Tracking began 22 October 2026 | — |
What was checked for codes?
| Source | Result on 22 October 2026 |
|---|---|
| Roblox game description | Two codes: Update2, HALLOWEEN |
| Fauna Studio group description and shout | No code; shout empty |
| Official update events (2) | No code printed |
| 18 pass and 92 developer-product descriptions | No code printed |
| Game and group social links (Discord, X) | Not readable without a Roblox login |
A Mitosis badge called Code Guesser exists in the badge list, but its official description is empty, so it does not reveal any code.
What if a Mitosis code does not work?
- Check capitalization and remove spaces before or after the code.
- Make sure you are in the Fauna Studio game, not a copy with a similar name.
- A code may be one use per account; the developer has not said either way.
- If both codes fail, the description may have changed since 22 October 2026. Compare with the current game page and tell us through Contact.
Codes are free extras; the core Mitosis loop on the how-to-play page does not depend on them.
Sources
The mechanics and numbers in this guide come from the material below. Open the original pages to check them yourself.
- S001 games.roblox.com games.roblox.com Accessed
- S002 groups.roblox.com groups.roblox.com Accessed
- S003 apis.roblox.com apis.roblox.com Accessed
- S004 mitosis.wiki mitosis.wiki Accessed
- S005 mitosiswiki.wiki mitosiswiki.wiki Accessed
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Mitosis Updates: Halloween Update and Update 1 (Roblox)
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