Undertale: Last Breath - M/E

4.8
261 reviews
10K+
Downloads
Content rating
Teen
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About this game

This is a port of ULB from SubRaiN/PG_Developer. It will include Legacy ULB, Canon ULB, Preview, Beta and Alpha ULB.

If you haven't played UNDERTALE (https://store.steampowered.com/app/391540/Undertale/) yet, I really recommend you to check it out first and play through it before playing this game. Warning, this game contains flashing lights and fast moving images. Play at your own risk.

Our Telegram Channel: https://t.me/subrainut
Our Discord Server: https://discord.gg/Hrj9xXyuN2

Mt.Ebott 201X Long ago two races ruled over Earth: HUMANS and MONSTERS. One day, war broke out between the two. However, you already know this story. This time, a human fell down, and without reason, slaughtered the monsters. Massacres came and went, starting and stopping, until this human found a mysterious door. Curiousity struck the human and they opened the door. A strange figure stood in the center of the room, broken and motionless.. This human tried to interact with the figure, Suddenly it left without reason… The figure was finally released, it could roam around. Eventually it found a stand. There he encountered a skeleton named Sans. Seeing him as a valuable asset, the figure spoke to him frequently about his fantasies and theories. The figure even talked about his experiences. Now that sans knew what was going on, he swore on his last breath he would stop the genocides, no matter the cost.

THIS PORT HAS OFFICIAL PLAYMARKET PERMISSION FROM CURRENT ULB OWNER MR. FAZBER.

SubRaiN - Mobile Edition Owner, Main Coder, Porter
Mr. Fazbear (Expressly) - Current ULB Owner
Sil_Gaming/QSV - QoL (Defenitive Edition) Owner/Contributor
ZerJox - Game Owner/Leader, Coder, Writer and Artist
Lit - Artist
BenLab - Musician
Mrky - Artist
Jedo - Musician & Writer
OvidiuGaming - Writer & Artist
Szkraft220 - Artist
Pixel-Icon15 - Artist
Hajjex - Coder
ThatOneEclair - Project Manager

SPECIAL THANKS TO TESTERS:

vlad_156;
RomaDantMine;
artemcs12;
USA_original;
Jlol147;
NotABitard;
Memaster64;
Dawg (ProTruba);
Eclair;
Sanstop84;
Dust120;
Darth_vad_er;
ВиНни;
LaJopaVania;
Not_Smash_Max;
Tails_a_fox;
Chai7_fr;
breyner2312;
Agent SCP Foundation.

All assets used in this description is by ZerJox and SubRaiN.
Updated on
Jul 13, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
No data collected
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Ratings and reviews

4.7
247 reviews
Robotgamer
August 4, 2025
this is a very good re creation of undertale last breath and I had a lot of fun playing it tho it is EXTREMELY HARD TO BEAT or I'm just bad
9 people found this review helpful
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Aung Aung
August 28, 2025
The game has something that needs fixing but kinda good.
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Hoppen Vafeas
July 19, 2025
I'm glad it got a mobile port, but I don't have to skill to beat it but I bet someone does very cool game 4 stars 🌟
1 person found this review helpful
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What’s new

Full release of ULB: Mobile Edition on Google Play!

1. Added Phase 1 to Beta and Alpha Eras;
2. Added Phase 3 to Beta Era;
3. Fixed incorrect collisions with Gaster Blasters;
4. Optimized bones;
5. Phases 1, 2, 3 in Legacy and Canon Eras have been improved;
6. Fixed dialog bubbles;
7. Cutscenes have been returned to the game.

Thanks to everyone who contributed to the release of this port on Google Play!