WebKit

v1.8 is out!

Check the changelog in game for a full list of changes!

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This pass allows you to get perks in some of my decks!

Gold Pass

I use this pass to develop stuff. This isn’t meant to be bought.

Developer test (DON’T BUY)

This gives you access to extra levels and a shortcut. (I’m MAKING IT FREE)

Extra levels and shortcut (DON’T BUY THIS)

Allows you to use the unused attack. (DO NOT BUY THIS I’m JUST TESTING PASSES. (Unless you want to buy it :)))))

Unused attack (READ DESC)

Undertale Thingy

rings

defense

started

opitems

dead

actors

invulnerable

screen

version

camshake

portalOn

enemies

bossdead

enemyHP

page

playedbefore?

hideTutorial

tempHP

maxhp

v1.7

mirrorbg

buttonpresses

effects

humans

attack

bowdamage

bowarrows

bowcooldown

bosshp

v1.8

environment

playableCharacter

statsDamageTaken

statsDeaths

oxygen

hpusesleftBossfight

unlockable1Unlocked

unlockable2Unlocked

blackHole

unlockable3Unlocked

screenFindthesquares

unlockable4Unlocked

unlockable5Unlocked

screenGrandAdventure

unlockable6Unlocked

unlockable7Unlocked

randomizerRngTitleScreen

screenRandomizer

disclaimerTemporary

unlockable8Unlocked

unlockable9Unlocked

statsAttacksUsed

statsBombsUsed

buttonpresses2

gravity

randomizerScore

randomizerChanceToReset

randomizerHighscore

oldTutorial

updateSender

v1.85

timeEscape

staminaEscape

staminaDrainEscape

staminaRefuellingEscape

directionEscape

timeLeftEscape

key_range

statsSecretsFound

unlockable10Unlocked

v1.9

attacksBreakApart

music

boss1health

boss2health

boss3health

keyEscape

startEscape

gunEscape

newDirectionEscape

bulletsEscape

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Undertale thingy v1.81 (5/28/2026) v1.8 is out! Remixes enabled!

Play Undertale Thingy by @bambi-corn-god on Castle

More #undertale games