Last checked: August 27, 2026

Untitled Slayer Codes [Summer Event] (August 2026) – Free Reroll Potions

By Money Lord — Founder & Editor | Updated: August 27, 2026

Untitled Slayer has five working codes as of August 27, 2026: !summerevent2026, !summerboost2026, !2.5mvisits, !imback and !15kfavourites. They pay reroll potions — for your clan, breathing style, Blood Demon Art and appearance — plus short 2x Yen and 2x Drop boosts. Never Robux. MortelCraft's open-world Demon Slayer RPG passed 2.9 million visits this week, and two of these five die within days.

All Untitled Slayer Codes

Active codes

Use these today, not next week. Try Hard Guides dates !imback to expire on August 28, and !2.5mvisits and !15kfavourites to September 7. The summer pair belongs to the Summer Event, which the Roblox virtual-events API shows running to 21:45 UTC on August 31, 2026 — and the developer's event listing advertises exactly "2 new codes on the community". Treat them as dying with the event.

Expired codes

Every entry above is dead according to two of our three sources. Two are contested: Roblox Den still lists !1.5mvisits and !ireadtips as working, while Try Hard Guides dates them expired on May 30 and the wiki dropped them on August 25; we side with the two that agree. Roblox Den also shows nine further codes as active that the wiki no longer carries at all — almost certainly dead too, but single-sourced, so they stay out.

How to Redeem Untitled Slayer Codes

Two redemption boxes exist here, and our sources at first looked contradictory. They are not — the wiki says plainly you can "either go into the menu and click on the settings button, or type them in chat":

1. Join the MBStudio Roblox community first. Both trackers list membership as a hard requirement, and the developer's description says "Join our community for codes".
2. Launch Untitled Slayer on Roblox (place ID 131576522724952).
3. Fastest route: open the normal Roblox chat window and type the code with its exclamation mark — !codenamehere — then press Enter.
4. Menu route: press M, click the settings button on the far left, then type into the "Type code here" field.

The chat method comes from the developer's live description, re-read with an English language header — Roblox silently translates description text, and the string was identical either way, so the ! prefix is literal, not a translation artefact. The M menu path is described identically by all three sources. If a brand-new code fails, the wiki advises retrying in the Hub or a private server; public servers can still be running an older build.

What the Codes Actually Give You

Codes hand out the "Unstable" potion variants, which cannot be traded; the tradeable versions drop from chests at 0.5% to 2% by tier or cost 50–100 Robux each. What they re-roll is the core of the game. A Clan is your second in-game name and carries stat buffs, and the wiki puts the common tier at 84.5% — which is why players burn whole stacks chasing a legendary. A Breathing Reset Potion lets you switch style; the six live ones are Water, Thunder, Flame, Insect, Wind and Mist, each 1,500 Yen plus a stat requirement from its trainer NPC. BDA potions do the same on the demon side. !summerboost2026 gives an hour each of 2x Yen and 2x Drop, against 399 Robux for the permanent 2x Yen pass as of August 27, 2026.

How to Get More Untitled Slayer Codes

Untitled Slayer is made by MortelCraft, a single developer, and ships through the MBStudio community (group ID 11630624), 36,400 members as of August 27, 2026 — the group the description links, and the one you must join to redeem.

Codes are announced in the community Discord, which the wiki points to for update logs. The invite resolves to a real, populated guild named "Untitled Slayer" with 8,104 members and 879 online on August 27, 2026, self-described as the game's official server. One honesty note: the Discord invites API shows the inviter is not the group owner — it was created by a founding wiki editor, not MortelCraft. Plainly the community hub, but we cannot prove developer ownership, so we will not claim it.

The code names reveal the pattern better than any schedule. Seven of the fourteen codes here are milestones — !7klikes, !20klikes, !4kfavourites, !15kfavourites, !1.5mvisits, !2mvisits and !2.5mvisits — and the live counters track that ladder exactly: 24,826 likes, 18,280 favourites and 2,944,450 visits as of August 27, 2026. Three are patch or apology codes, two are event codes. Watch the visit counter; the next is due at 3 million.

Why Aren't My Untitled Slayer Codes Working?

You are not in MBStudio — the most common cause here, and unusual among Roblox games. You are on an old server; rejoin through the Hub or a private server. The code is dead — Roblox Den's list is visibly behind the wiki's, so a code copied from an out-of-date page will simply fail. Punctuation: these codes carry a leading exclamation mark and !2.5mvisits also has a full stop; both must survive the paste. Roblox Den calls the codes case-sensitive, but neither the wiki nor the developer says so — everything is published in lowercase, so lowercase is safe. One use per account.

When Are New Untitled Slayer Codes Released?

There is no calendar, and the wiki's own codes editor writes that codes "drop too often" to keep up with. The triggers are milestones, patches and events, and the game is still shipping: the current build is Update 3.4.3, which added the Summer Event plus PvP changes including move wind-ups and a new ragdoll. The wiki also names the next major drop — Update 4.0, bringing the first raid, Mugen Train, and three new styles (one breathing, two Blood Demon Arts). Version bumps have carried codes before, so a successor to !update3.3 is a reasonable expectation rather than a promise.

Untitled Slayer in Numbers

All figures pulled live from the Roblox API on August 27, 2026: 2,944,450 visits, 18,280 favourites, and 24,826 likes against 1,341 dislikes for a 94.9% rating. It launched on September 24, 2025 and servers cap at 30 players.

Be realistic about the player count. Two pulls that morning returned 75 and 90 concurrent players — a small, dedicated audience rather than a chart-topper, and we would rather say so than dress it up. It is genuinely still being worked on, though: the updated stamp moved on August 26, 2026 and an event is running live. The badges show the funnel: 440,153 accounts hold Tutorial, 28,371 cleared Final Selection to become a Slayer, 9,721 took the Evil Path to become a Demon, and just 67 have "Kill the owner". All eight game passes are for sale at 199–499 Robux as of August 27, 2026. No code here grants a pass, Robux, or any tradeable item.

How We Verified This List

We started with primary sources: the live Roblox listing for universe 8790251483, read with and without an English language header to rule out auto-translation corrupting a code word; the virtual-events API, which supplied the Summer Event window and the developer's "2 new codes" line; and the badge, votes and game-pass endpoints. Only then did we cross-check three code sources against each other. Our full standard is on the how we verify codes page.

The three sources, named. The Untitled Slayer Fandom wiki Codes page, last edited August 25, 2026 — a real wiki with hundreds of item and mechanic pages, not a stub, on a domain registered in 1996. Try Hard Guides (tryhardguides.com, registered April 2020, independent of the studio), also last edited August 25, 2026. Roblox Den (robloxden.com, registered April 2020, Dantoo Ltd), re-checked 02:32 on August 27, 2026. All three link the same place, 131576522724952, so none is covering a different "Slayer" game.

What we threw out. Thirteen further codes sit on Try Hard Guides' expired list and on neither other source — a three-active-versus-nineteen-expired split is exactly the shape a padded archive takes, so we left them out rather than reprint them unverified. We also discarded a YouTube "all working codes" video posted the day before this page: it names no source and could not be tied to this place ID.

Frequently Asked Questions

Not affiliated with Untitled Slayer, MortelCraft, MBStudio, or Roblox Corporation. Code availability can change at the developer's discretion.