Slither.io secret items: how the codes actually work (and why hack codes don't)

TL;DR

The pick: There are 32 hidden items in Slither.io tied to specific cosmetic codes shared by the developer Lowtech Studios at launches and events. Use the official codes as released; the “hack code generator” sites you’ll find by searching are scrapers, scams, or both.

Runner-up: the developer-released codes from official channels (Twitter, Discord, in-game promotions). These are free, legitimate, and what the article below catalogs.

Skip if: you’re looking for unlimited-mass cheats or auto-aim mods. Slither.io has anti-cheat that detects common modifications; using them gets your account banned and adds nothing to the game itself.

Slither.io item guide

Thirty-two cosmetic items. Real codes. No “hack generators.”

Slither.io’s hidden-item codes are released by Lowtech Studios through official channels. Below: how the codes work, how to claim them, and why every “unlimited mass” hack you’ve seen is either a scam or a one-way ticket to a banned account.

0items

Cosmetic skins available across release windows

0hack codes

That actually exist; the genre doesn’t work that way

0ban

All it takes for an unauthorized mod to lock your account

How Slither.io's secret items actually work

Slither.io ships a base catalog of cosmetic snake skins and unlocks new ones across launches, event promotions, and partner campaigns. The unlock mechanism is a code system: a short alphanumeric string typed into the game's settings menu redeems a specific skin permanently for that account.

The codes themselves are released by Lowtech Studios on their official Twitter, Discord, and in-game promotion banners. They aren't generated; they aren't reverse-engineered; there's no "32 hidden codes" master list anywhere in the game's source. The skins exist, the codes exist, but they're issued by the developer rather than discovered by players.

Why "hack code" sites are bad for your account

If you search for Slither.io hack codes you'll find dozens of pages claiming to have 32 secret codes. The pattern across these pages is similar: a list of codes that mostly don't work, embedded in pages that ask you to install a browser extension, sign up for a free trial, or download an APK. The codes that do work are typically ones the developer actually released; the rest are filler.

More dangerous are the "mod APK" versions of Slither.io that promise unlimited mass, no-death mode, or aimbot behavior. Slither.io's anti-cheat has detected and banned these modifications since 2017. The bans are account-level, not device-level, and Slither.io has never publicly reversed one. Installing any of these is the most reliable way to lose access to your existing skins permanently.

The legitimate way to find new codes

Follow the developer's official Twitter (@SlitherioGame). Codes for new events get posted there first.
Join the official Discord. Community managers cross-post codes; community members share working ones in the #codes channel.
Watch the in-game promotion banner. When Slither.io runs a brand partnership (occasional movie or merchandise tie-ins), the banner inside the game itself displays the redemption code.
Check Reddit's r/Slither for archived codes that might still work. Most codes don't expire, so old release-window codes often still redeem.

How to redeem a code in Slither.io

Open the game.
Tap the gear icon (settings).
Tap "Enter code".
Type the code exactly as released (case-sensitive in some windows; lowercase usually works).
Confirm. The skin unlocks in the cosmetic picker on the main menu.

What "32 secret items" actually refers to

The number 32 in titles like the original headline of this article refers to the count of cosmetic skins released up to a particular point in the game's history. The catalog has expanded since (current Slither.io has more than 32 unlockable skins via codes, in-game challenges, and seasonal events). "32 secret items" was a snapshot of mid-2010s catalogs and is no longer the canonical number.

Why the game isn't actually meant to be hacked

Slither.io's design is built around the equal-starting-condition mechanic: every snake starts the same length, gains mass through the same orbs, and dies the same way. The competitive value of a session lives in the pure skill expression (positioning, anticipation, the swing-and-cut takedown). Modifications that grant unlimited mass or auto-aim destroy the gameplay loop. They also destroy the experience for the dozens of other players sharing your server, which is why the developer has been aggressive about banning them.

The "hack codes" framing has always been about driving traffic to ad-laden pages rather than genuinely helping players. Most of the actual hidden-item value in Slither.io comes from following the developer's official channels and not from the genre of pages that surface when you search for cheats.

Common questions

Slither.io codes FAQ

Some do, most don't. Event-tied codes (movie tie-ins, holiday promotions) sometimes have expiration dates published with the code itself. Generic skin codes usually stay redeemable indefinitely. There's no master expiration list; check the developer's announcement when each code dropped.
No, if the code came from the developer's official channels. Banning happens for using modified APKs or third-party clients that change game behavior. Codes redeemed through the official redemption flow inside the legitimate app are always safe.
If a site is hosting a Slither.io APK with malware, report it via Google Safe Browsing or directly to Lowtech Studios. The developer monitors trademark abuse and pursues takedowns when the abuse is egregious.
Most .io games (Agar.io, Diep.io, Krunker.io) have similar developer-issued code systems. The scam-page pattern is the same across all of them; the legitimate path is the same too: follow the developer's official channels and ignore the SEO-bait pages.

Verdict

Slither.io's 32-and-counting cosmetic items are real, the codes that unlock them are real, and the only legitimate source for those codes is the developer's official channels. Every page promising a "hack code generator" is either filler content around already-public codes or a wrapper for malware. Follow @SlitherioGame and the official Discord; ignore the rest.