[🎉RELEASE🎉] Undertale Adventures X Calculator

Type the trait percent from your Traits menu. The form estimates the chance of at least one success. The 0.1 starting value is the documented Determination rate, not a new October 2026 reading.

By [🎉RELEASE🎉] Undertale Adventures X WikiLast updated: 2026-10-13

This calculator is arithmetic on a table, not a live mixer. Enter quantities from your own [🎉RELEASE🎉] Undertale Adventures X session. It will not click the shop.

Drop probability

Trait reroll chance

Estimate the chance that a trait appears at least once. Type the percent from your own Traits menu. The 0.1% example is the documented Determination rate, not a live reading from October 2026.

Trait chance (%)Rerolls

Enter values from your session.

Chance of at least one success = 1 − (1 − chance per attempt) raised to the number of attempts.

The 0.1 starting value is the Determination rate on the community trait table, whose Royal Guard Soul rate of 15% matched an August 2, 2024 in-game odds screen. Replace it with the percent shown in your Traits menu. The result is the chance of at least one success across independent rerolls. It does not read your inventory, and it is not evidence that the October 12, 2026 experience update left the table unchanged.

FAQ

[🎉RELEASE🎉] Undertale Adventures X calculator 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.

Trait reroll chance

[🎉RELEASE🎉] Undertale Adventures X calculator questions

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