Under Mt. Ebott
Few indie games have left a mark on players quite like Undertale, and for years Minecraft fans have wished they could step into that world themselves. Under Mt. Ebott answers that wish by adding a full dimension inspired by the Underground, complete with its own atmosphere, items, and a branching sense of morality. Whether you want to wander the Ruins in peace or carve a darker path, this add-on gives you the tools to decide.
A Dimension of Peace or Nothing
The heart of the mod is a brand-new dimension that can feel either welcoming or desolate depending on how you approach it. The Ruins are roughly 95% finished, offering crumbling corridors, puzzles, and the eerie quiet that fans of the original game will recognize instantly. Snowdin is still early in development at just over one percent complete, so expect that frosty town to grow in future updates. For now, the Ruins serve as the main playground and a strong proof of concept for what is coming.
Items, Weapons, and Gold
Survival in the Underground needs the right gear, and this mod delivers a growing arsenal pulled straight from Undertale lore. The current lineup includes:
- Toy Knife - 3 AT, a humble starter weapon
- Faded Ribbon - 3 DF, light protective wear
- Real Knife - 99 AT, a devastating late-game blade
- Gold - the currency of the Underground
- Ruined Bringot - a new tool tier for mining and crafting
The developer's long-term goal is to include every asset that has an Undertale equivalent, so this list will keep expanding. That ambition is exactly why the project has attracted a dedicated following among fans who want more than a simple texture pack.
Supported Versions and Loaders
Compatibility is a big part of what makes this add-on accessible. The most recent Forge build is 1.3.9b, and it runs on Minecraft 1.20.1 and above, though those newer versions require Geckolib as a dependency. The latest NeoForge release is 1.4.2, which also needs Geckolib installed. Beyond those, the developer has planned support for a wide range of versions, including 1.12.2, 1.14.4, 1.15.2, 1.16.2, 1.17.1, 1.18.2, 1.19.2, 1.19.4, 1.20.4, 1.20.6, and 1.21.1. The versions actively being worked on right now are 1.20.1 and 1.21.1, with a Fabric port also on the roadmap.
If you would rather skip the manual setup, the foxygame.net launcher offers a tidy one-click install for Under Mt. Ebott, pulling the correct build and its Geckolib dependency automatically so you can jump straight into the Ruins.
How to Install Under Mt. Ebott for Minecraft
Getting started is straightforward once you know the steps. Here is the general process:
- Confirm your Minecraft version matches a supported release, such as 1.20.1 or 1.21.1
- Install the correct loader, either Forge or NeoForge
- Add Geckolib to your mods folder, since newer builds depend on it
- Place the Under Mt. Ebott file alongside Geckolib in the mods directory
- Launch the game and select the modded profile
Players who want to download Under Mt. Ebott should always grab the build that matches their loader, because mixing a Forge file with a NeoForge setup will cause crashes. Once everything is in place, the new dimension becomes reachable and the full item set unlocks.
Why the Underground Is Worth Exploring
The developer started this project after struggling to find a complete Undertale mod, and that frustration shaped a clear vision: build the definitive version. The result is a mod that respects the source material while fitting naturally into Minecraft's blocky survival loop. The morality-driven theme, where the world can be peaceful or empty, gives players a reason to return and experiment with different playstyles.
With the Ruins nearly done and Snowdin on the horizon, Under Mt. Ebott is only getting bigger. If you have ever wanted to walk the corridors beneath the mountain, this add-on is the closest thing to stepping through that door yourself.