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Undertale Universal Massacre Codes
Working Undertale Universal Massacre Codes
Last updated August 21, 2026
No working codes right now
We're tracking Undertale Universal Massacre and will list codes here the moment the developers release them. If you spot one first, send it our way below.
How to redeem codes in Undertale Universal Massacre
- Launch Undertale Universal Massacre on Roblox.
- Look for a Codes, Shop or settings button — usually on the side of the screen.
- Paste the code exactly as shown above. Codes are case-sensitive.
- Press redeem to claim your reward.
Codes expire without warning — if one fails, it was almost certainly pulled by the developer.
Found a code we're missing?
Submit it and we'll verify it before it goes live.
About Undertale Universal Massacre
Shutdown = Update / Fix This game is made with UT:MM Kit made by Nikolander and A_RandomDoggo. This is an rpg game about fighting against Undertale AU's (sans mostly) and gaining items, gold and exp to progress in the game, you'll unlock SOULs in the first timeline. Be aware that all game passes in this game can also be obtained by playing the game. Note: Your account has to be at least 14 days old for you to be able to join the game.