Key takeaways
Undertale Adventures X at a glance
- Free to play on Roblox — up to 15 players per server; optional in-game purchases may apply.
- Developed by Side Productions.
- 4K players online at last check, 21.9M total visits, 93% rating.
- 7-day popularity peak on Oct 17, 2026; heat score 10/100.
- Players are mostly looking up codes, units and traits.
What is Undertale Adventures X?
Undertale Adventures X is a tower defense game on Roblox by Side Productions. Its Roblox description: “The Halloween update is now live! We hope you all enjoy! A tower defense game based on Undertale Defend your base from monsters using Undertale units Level up your units and make them stronger with traits”
Community guides describe it this way: “Every working Undertale Adventures X code with its reward and verified date — free Soul Rerolls and Trait Rerolls, exact redeem steps, expired tracking and unit guides for the Roblox Undertale tower defense.” The developer has shared few other details so far, so expect this entry to grow as the game does.
Undertale Adventures X is made by Side Productions. The experience went live on Jul 16, 2024 and has logged 21.9M visits. On Roblox, servers hold up to 15 players, 45K players have favorited it and 93% of ratings are positive. It is free to join; optional game passes or items may be sold for Robux. Modes on record: servers of up to 15 players.
Popularity peaked on Oct 17, 2026 and has steadied since — still well above where it started. Its Roblox title currently carries a “Halloween” banner, the developer's signal of fresh content. Players are mostly looking up codes, units and traits.
Undertale Adventures X screenshots & media
2 official screenshots. Select an image to enlarge it.
Gameplay mechanics & features
Core loop
A tower defense game based on Undertale Defend your base from monsters using Undertale units Level up your units and make them stronger with traits
Modes
Servers of up to 15 players. Every server is shared with other players.
Progression
Progression is economy and army growth across a match or campaign. The systems players document most are units and traits.
Controls & platforms
Plays through the Roblox app on PC, Mac, phones, tablets and Xbox (the developer decides which devices are enabled).
Store & community tags: Strategy, Tower Defense, Adventure
Latest news, release & update tracker
- Release status
- Live
- Release date
- Jul 16, 2024
- Access
- Live on Roblox
- Latest update
- Updated on Roblox Oct 27, 2026 · “Halloween”
- Added
- Oct 23, 2026
Current Roblox title banner: “Halloween” — the developer's own label for what is new.
- Game updateUpdated on Roblox — “Halloween”
The developer pushed a new version of the experience. It now counts 21.9M visits.
- AddedUndertale Adventures X added to gee.wiki
Coverage opened with official store links, gameplay breakdown and beginner tips.
- Popularity peakPopularity index peaked at 62/100
Popularity peaked on Oct 17, 2026 and has steadied since — still well above where it started.
- Went liveWent live on Roblox
Dates are UTC. We add patch notes here as soon as the developer publishes them.
Where to play
Undertale Adventures X runs inside Roblox, so it is free to start on any device the Roblox app supports. Use the official game link below — copycat experiences with near-identical names are common.
Community & official links
Official channels
Community wikis (fan-made, unofficial)
Creator videos
No creator video numbers on record yet for Undertale Adventures X — new games usually pick up coverage within days of breaking out.
How to play: beginner tips
- Codes expire fast in new games: redeem new ones the day they drop, and only trust codes posted by the developer.
- Join a fuller server if you are new: veteran players and active events make early progress much faster.
- Upgrade your economy first, army second.
- Save currency for upgrades instead of spamming low-tier towers.
About codes: We do not republish code lists we cannot verify. Working Undertale Adventures X codes are announced by the developer — check the game's Roblox description, its official community group and in-game update boards. Codes are usually case-sensitive and expire without notice.
Genres, platforms & tags
- Platform
- Roblox
- Status & momentum
- New & notableLive
- Player topics
- CodesUnitsTraits
- Play modes
- Servers of up to 15 players
- Store tags
- StrategyTower DefenseAdventure
7-day popularity & player activity
Over the past seven days, the popularity index for Undertale Adventures X moved from 33 to 21 on a 0–100 scale, peaking on Oct 17, 2026. Week over week that is a -28% shift in momentum. Added to gee.wiki on Oct 23, 2026.
View daily values as a table
| Day | Popularity index (0–100) |
|---|---|
| Sat Oct 17 | 33 |
| Sun Oct 18 | 51 |
| Mon Oct 19 | 37 |
| Tue Oct 20 | 30 |
| Wed Oct 21 | 25 |
| Thu Oct 22 | 22 |
| Fri Oct 23 | 21 |
Undertale Adventures X FAQ
What is Undertale Adventures X?
Undertale Adventures X is a tower defense game on Roblox by Side Productions. The experience went live on Jul 16, 2024 and has logged 21.9M visits. It is tagged Strategy, Tower Defense and Adventure.
Is Undertale Adventures X free?
Yes. Undertale Adventures X is free to play on Roblox — you only need a free Roblox account. Like most Roblox games it may sell optional game passes or in-game items with Robux; none are required to start playing.
Is Undertale Adventures X out yet?
Undertale Adventures X is live on Roblox and first went live on Jul 16, 2024. The developer last updated it on Oct 27, 2026.
Can I play Undertale Adventures X with friends?
Yes. The modes on record are servers of up to 15 players. Invite friends from the Roblox app to join the same server.
Who made Undertale Adventures X?
Undertale Adventures X is developed by Side Productions.
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