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[🎉RELEASE🎉] Undertale Adventures X Wiki

Hold the line with Undertale units, then roll a better trait.

[🎉RELEASE🎉] Undertale Adventures X is Side Productions' Roblox tower defense game. You defend a base from monster waves with Undertale-inspired units, level those units, and strengthen them with traits. This wiki keeps the October 2026 code list, the 12-trait rate table, the regions players cleared on video, and the unit roles that public lineups repeat.

[🎉RELEASE🎉] Undertale Adventures X is Side Productions' Roblox tower defense game. You defend a base from monster waves with Undertale-inspired units, level those units, and strengthen them with traits. This wiki keeps the October 2026 code list, the 12-trait rate table, the regions players cleared on video, and…

By [🎉RELEASE🎉] Undertale Adventures X WikiLast updated:

Play [🎉RELEASE🎉] Undertale Adventures X Open the beginner guide
Official Roblox thumbnail for Undertale Adventures X
5
Guides
51
Recorded entries
2
Active codes
Game overview

What is [🎉RELEASE🎉] Undertale Adventures X?

[🎉RELEASE🎉] Undertale Adventures X artwork

Start a match with the units you own. Spend the limited opening purse on a placement that can hit, then upgrade it with money from defeated enemies. Between matches, summon or earn the next role, level the unit you will keep, and roll traits only after you can see the percent on the trait screen. When clears are stable, look at Raids tokens, the AFK Chamber, and the Underpass. Codes, when they still work, go in the Codes button on the right.

Tower defense built around Undertale unitsLevels and trait rollsIn-match gold from killsCodes from the right-side buttonRaids, AFK, and the Underpass

Quick facts

Developer
Side Productions, the verified Roblox community linked on the game page.
Created
July 16, 2024, from the public experience record.
Genre and server
Strategy / Tower Defense. Server size 15.
Entry
The listing has no paid entry price. Optional Robux passes exist.
Listing updated
October 12, 2026. The description still introduces the Release loop. No patch notes were on the listing.
Visits snapshot
17,419,302 visits on the public record read October 13, 2026. The count moves and is not a live ticker.
Explore the wiki

Where are [🎉RELEASE🎉] Undertale Adventures X codes, guides, and tools?

Featured
Codes
Guides

Codes

Working pair and the expired archive, including three disputed strings.

Traits
Guides

Traits

Chance and effect for every listed trait.

Team roles
Guides

Team roles

The five names both public lineups put on top, and who can stand in.

Raids and passes
Guides

Raids and passes

Raid tokens, Underpass XP, and passes whose perks were actually stated.

Video guides
Guides

Video guides

Same-place tours from the Ruins era through the 2026 Christmas upload.

Unit tier list
Guides

Unit tier list

Community letters, labeled as lineups rather than a new playtest.

Video Tutorials

Watch [🎉RELEASE🎉] Undertale Adventures X in action

All video tutorials
Latest updates

What changed in [🎉RELEASE🎉] Undertale Adventures X recently?

  1. minorExperience record updated, no public patch notesThe public Roblox record for this experience was updated on October 12, 2026. The description still introduces the Release as a tower defense game where you defend with Undertale units, level them, and strengthen them with traits. No patch notes were posted on the listing, so this entry does not claim new units, codes, or balance changes. Recheck the Codes button and the trait percents after you join.
  2. majorWaterfall update shown as playableFootage published September 21, 2024 shows the Waterfall update as playable on this place: a new map, a Waterfall summon, the Underpass reward track, and a 25-wave anniversary raid that paid candles for gift skins. September 21 is the publish date of that walkthrough, not a developer clock time.
  3. majorSnowdin update shown as playableFootage published August 9, 2024 shows the Snowdin update as live, with a new summon banner, Gauntlet changes, equipment drops, and a statement that trait materials became harder to earn from ordinary stages. August 9 is the publish date of that walkthrough.
  4. milestoneExperience createdSide Productions created the Roblox experience on July 16, 2024. The current public description is the Release text about units, levels, and traits. The original description from that day was not preserved on the record read here.
Popular
  1. 1PopularCodes
  2. 2PopularTraits
  3. 3PopularTeam roles
  4. 4PopularRaids and passes
  5. 5PopularVideo guides
  6. 6PopularUnit tier list
How to start

How do you start [🎉RELEASE🎉] Undertale Adventures X?

  1. 1

    Start with one clear

    What the listing confirms, then how a 2024 match spent its money. Open page

  2. 2

    Check codes before you type them

    2KCCU! and FREESTUFF! were the working pair. Older strings are archived. Open page

  3. 3

    Read traits before you reroll

    Twelve traits, with the rate table that matched a 15% Royal Guard Soul roll. Open page

  4. 4

    Cover the four combat jobs

    Area damage, bosses, a front line, and crowd control, plus substitutes. Open page

  5. 5

    See which region you are in

    Ruins through Core, in the order footage supports. Open page

All pages

Where is every [🎉RELEASE🎉] Undertale Adventures X page?

CodesCodesCodesCodesCodesHow to RedeemCodesExpiredGuidesGuidesGuidesGuides OverviewGuidesClear your first defenseGuidesTraits, rerolls, and stat lettersGuidesRaids, tokens, AFK, and passesGuidesCover the four combat jobsGuidesRegions, gauntlets, and old eventsVideo TutorialsVideo TutorialsTier ListTier ListTier ListTier ListTier ListunitsPlayersPlayersPlayersAll entriesPlayersSans
FAQ

What do players ask about [🎉RELEASE🎉] Undertale Adventures X?

What is Undertale Adventures X?

It is a free Roblox tower defense experience by Side Productions. You defend a base with Undertale-inspired units, level those units, and strengthen them with traits. The experience was created on July 16, 2024, and the public record was updated on October 12, 2026.

Is Undertale Adventures X free?

The Roblox listing has no paid entry price. Optional Robux gamepasses exist. Known names include VIP, SHINY Hunter!, Supporter, +50% Tokens, and 2x XP. Current Robux prices were not on the public listing text used here.

Who makes the game?

Side Productions, the verified Roblox community that owns the experience. The community page is linked from the game listing.

How do codes work?

Open the Codes button on the right side of the screen, enter the full string, and press Enter or Redeem. Only 2KCCU! and FREESTUFF! were still reported working in October 2026, and both rewards were described only as freebies.

Do trait rates still match the old table?

Trait rerolls assign one of 12 listed traits. The rate table matches an August 2024 odds screen for Royal Guard Soul at 15%, and a November 29, 2024 video described the Perseverance buff the table now shows. Read the percent in your own Traits menu before you spend a large stack of rerolls.

Ready to play [🎉RELEASE🎉] Undertale Adventures X?

Play from the official Roblox listing, or follow the beginner route if you want the first match and the trait menu in order.

Play [🎉RELEASE🎉] Undertale Adventures XStart with the beginner guide