Worlds

Core

Late area used as a path to the AFK Chamber in 2024 and as a grind name in 2025.

Core in [🎉RELEASE🎉] Undertale Adventures X

Core: Late area used as a path to the AFK Chamber in 2024 and as a grind name in 2025. Get it by Later progression. The AFK path through Core and the MTT Hotel is from August 2024. Use it to If you are looking for the AFK Chamber and the old path still exists, the tour went through Core to the MTT Hotel. Confirm the…

What is Core?

Core is the later area players named beside Hotland when asking where to grind kills. An August 2024 tour also walked through the Core to reach the MTT Hotel and the AFK Chamber. No October 2026 stage list confirms the current acts.

Published facts

Core facts
FactValue
When it was shownNamed in 2024 pathing and 2025 grind questions

How do you get Core?

Later progression. The AFK path through Core and the MTT Hotel is from August 2024.

How do you use Core?

If you are looking for the AFK Chamber and the old path still exists, the tour went through Core to the MTT Hotel. Confirm the teleport button first.

FAQ

Core questions

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.