Undertale: The Mod
Minecraft Java mod. Downloads from the MC Java Mods app on Android.
⬇ Download on CurseForge
UNDERTALE: THE MOD
This Undertale (created by Toby Fox not me) will add many great components from the game, and even more!
What This Mod Will Bring
The mod will include Bosses of characters, items from the game, a whole new "Underground" dimension and more! You can go Genocide or Pacifist and have different interactions with the characters from the game too!
HOW TO ACCESS THE DIMENSION:
1. Find the "Ruins" Biome in the main game.
2. Make a portal out of the Ruin Bricks found on the floor.
3. Light the portal with the Golden Flowers also found in the biome.
4. Explore and find all of the characters!
- Edition: Minecraft Java
- File type: .jar
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as Undertale Mod (1.12.2)V1.0.2.jar — drop this file into the mods folder
- Download size: 4.1 MB
- Download link checked 14 Oct 2026 — working
These come from our own check of the pack file, not from the source page.