Comments (238)
Undertale Last Breath Phase 3 RTF's Take 2
Undertale Ultra Sans Fight RTF's Take
Undertale Last Breath Phase 3 RTF's Take
Undertale - Battle Sumilator - Dusttrust Phase 1 By RTF Nerfed Mode Complete!
> https://youtu.be/I8gg4o5YkcQ
Undertale - Battle Sumilator - Ultra Sans By RTF Nerfed Mode Complete!
> https://youtu.be/m7ZhOnl_VWI
Undertale - Battle Sumilator Last Breath Phase 3 by rtf Nerfed Mode Complete!
> https://youtu.be/X2V4zTXV6A0
Му gameplay Debug Mode - https://youtu.be/K0utPm70DCQ
Awesome game :)
https://www.youtube.com/watch?v=AM57MuVmSwQ
ULTRA SANS Fight(Private Version): https://youtu.be/rFYEssYLDcg
MonkE battle(Private Version): https://youtu.be/ihc80FazuVE
ULB Phase 3 By RTF(Private Version): https://youtu.be/qeHM-YtGi0g
Hard Mode Sans By RTF: https://youtu.be/A0hR10JI-Yw
Pacifist Flowey Battle: https://youtu.be/2v5Y8vSDtoo
Free
Undertale - HQ
This game is compiled with YYC. So if you want to port this game to android or other platforms, Please let me know in the discord server.
Free
UTHQ - DUSTTRUST
A standalone DUSTTRUST game released in 12/15/2025.
Free
UNDERTALE - Battle Simulator
This is the collection of UTBS(Undertale : Battle Simulator). As I and this game were influenced by how FDY makes his games, You would find it bad and hellish-hard. If you want to feel the difference between this game and Undertale HQ, I suggest it. But don't complain because this has been discontinued.
Undertale - HQ
Discord : https://discord.gg/g2kkZ4JFt9
A collection of Undertale fangames with my styles.
You need to be on 64-bit Windows in order to run this game!
이 게임은 한국어를 지원합니다.
What does Undertale - HQ provide?
Undertale HQ provides unique Undertale fangames / famous Undertale fangames that were made with RTF's style. But don't worry. The game-making styles aren't based on 2021~2023 era. It will completely be based on the new styles of making.
Why does this exist?
Basically Just For Hobby. I don't have any plans to make this game famous just like the big projects ongoing in Undertale Community. When I find one interesting, or when someone wants HQ to have that battle, I'll try to make it. But it doesn't mean I'll make it with 100% chance.
Is it possible to run this game other than Windows(for example, Android or Linux)?
(UPDATE 12/25/2025) : There are some unofficial ports for Android these days. Note that these are unofficial ports! You take your responsibilities for using what could potentially cause your phone to get infected by an unknown malware.
Since the features in the extensions of this game are designed for Windows, It is unlikely that this game will be ported for other operating systems, as it will take much more work to make the extensions fit for the specific OS.
Windows Defender or My anti-virus detected the extension file as a Trojan virus!
Since some functions of the extension (UTHQEXtension.dll) need the access to your Windows system, It can be flagged as a trojan virus. But YOU DON'T NEED TO WORRY. The file is 100% safe.
Is the source code project of Undertale HQ available?
There's a GitHub repo of Undertale HQ for back-up purposes, But It is unlikely for Undertale HQ to be open-sourced later, As some resources are highly confidential, It will be dangerous for me to do it.
Mild Cartoon Violence
Fantasy Violence
Mild Realistic Violence
Realistic Bloodshed
Mild Language
Comical Shenanigans
