Sudden Changes

3.0

KYwoo

4.09

157 reviews

10,000+
Downloads

Free

Welcome to Sudden Changes! An UT AU where Sans got a GUN!

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About Sudden Changes

Sudden Changes is a role playing app developed by KYwoo.

Download Statistics

Sudden Changes has been downloaded 31 thousand times. In the last 30 days, the app was downloaded 2.6 thousand times.

User Ratings

Sudden Changes is rated 4.09 out of 5 stars. The rating is based on 160 ratings.

App Information

Sudden Changes is FREE to download. The APK download size is 12.85 MB. The latest version available is 3.0. The last update was on July 13, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on Google Play February 2025.

Description

This is a completely free to play fan-made unofficial project based on the original Undertale™ game created by Toby Fox.
All rights, characters, and assets belong to their respective owners.
This game is a fan work that is not affiliated with Toby Fox or the official Undertale team.
For any copyright inquiries or asset removal requests, please contact me directly at kywoo0130@gmail.com. I respect intellectual property and am fully committed to resolving the issues!

* Undertale By Toby Fox
* Created By xiaoQ
* Android Port By Ilka
* Released By KYwoo

This game is about the Sans boss fight in Sudden Changes.

The Story:
【NO AU】Sudden Changes is a role swap following the basic rules of Storyshift with only the lost souls, along with Mettaton, Napstablook, Chara and Asriel changing positions.

Recent changes:
Latest Release of Sudden Changes! SANS HAVE A GUN!

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More data about Sudden Changes

Price	Free to download
Total downloads	31 thousand
Recent downloads	2.6 thousand
Rating	4.09 based on 160 ratings
Ranking	Not ranked
Version	3.0
APK size	12.8 MB
Number of libraries	?
Suitable for	Everyone
Ads	NO ads

App Performance Report

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Alternative downloads for the Sudden Changes app

Sudden Changes compared with similar apps

Common keywords of similar apps

Sudden Toby Fox Au Gun Fan Created Sans Undertale Game

Keywords missing from this app

Https Recent Battle World Characters Play Story Create Notice Supported Unique Character Support Http Adventure Mode Features Experience Soul Full App Rpg Saga Application Fixes Fixed Mobile Team Bug Enjoy Ads Free Premium Japanese Device Fight Save Combat War Policy Facebook Einheriar Time Test Battles Boss Fantasy

Google Play Rating history and histogram

Rating history

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Downloads over time

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Sudden Changes has been downloaded 31 thousand times. Over the past 30 days, it averaged 87 downloads per day.

Changelog of Sudden Changes

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Developer information for KYwoo

KYwoo

kywoo0130@gmail.com

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Comments on Sudden Changes for Android

★★★★☆ Debra Burks · Jul 16, 2026

This game is good, but it has the lack of options like switching the joystick and buttons l was hoping if you could also add debug mode for those who struggle at some of the hard parts of the game

★★★★★ Alireza B · Jun 4, 2026

I love every fan games of undertake and delta rune but... WHY THEY ARE TOO HARD!

★★★★☆ Jadiel Zaya · Mar 20, 2025

It's nice but too hard I tried it, but there's no debug mode or easy mode so please rebalance it

★☆☆☆☆ Oliver · Nov 9, 2025

The fight itself is good, but the QoL is awful. There's no way to configure anything. Want to play in English? Nope, gotta translate Chinese. Want to control yourself with one hand? Nope, gotta use both in a way that makes no sense. And lastly, there's no way to change the difficulty like you can in any of KY woo's other apps, leaving it nothing but painful to play in few faults by the player.

Google Play Rankings for Sudden Changes

This app is not ranked

Technologies used by Sudden Changes

1 permissions

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