Sudden Changes

2.0

KYwoo

4.00

143 reviews

10,000+
Downloads

Free

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

About Sudden Changes

Sudden Changes is a role playing app developed by KYwoo.

How many times has Sudden Changes been downloaded?

Sudden Changes has been downloaded 26 thousand times. In the last 30 days, the app was downloaded 1.2 thousand times.

What is the rating of Sudden Changes?

Sudden Changes is rated 4.00 out of 5 stars, based on 140 ratings.

Is Sudden Changes free?

Sudden Changes is free to download. The APK download size is 12.88 MB. The latest version available is 2.0. The last update was on September 20, 2025.

What are the requirements for Sudden Changes?

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	26 thousand
Recent downloads	1.2 thousand
Rating	4.00 based on 140 ratings
Ranking	Not ranked
Version	2.0
APK size	12.9 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 World Battle Characters Create Notice Free App Soul Supported Unique Http Character Features Rpg Fight Story Team Application Japanese Facebook Adventure Stickers Support Fixes Play Mobile Save Power Policy Time Level Official Combat Experience War Bug Fantasy Bonus Premium Agreement Eula Privacy Enabled Devices Device

Google Play Rating history and histogram

Rating history

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Downloads over time

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Sudden Changes has been downloaded 26 thousand times. Over the past 30 days, it averaged 40 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

★★★★★ Bruce · May 7, 2025

This might not be original, but it is as good, can you add a joystick?

★★★★★ 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

★★★★★ Ishmail Johnson · Apr 13, 2025

It's a really good fan game I like how sans look

★☆☆☆☆ 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

6 permissions

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