UnderFabric
by Just-Leah
UnderFabric brings the Undertale series into Minecraft through a Fabric mod that players and servers install together.
What it does
UnderFabric brings a collection of items and content drawn from the game Undertale into a Minecraft world, for players who want that theme inside the game. It runs on both the client and the server, so every player and the server need it. Only Fabric builds exist, for Minecraft 1.16.4 and 1.16.5, and the latest file is 1.2.3 for 1.16.5, an alpha build from 2021-04-11. The code is released under the CC0 1.0 Universal license and is open source.
Key features
Undertale-themed content
Adds items and features drawn from the Undertale game, as an alternative to the few Undertale mods the author found lacking.
Three story routes
The author notes that Undertale has three routes, and the mod carries content reflecting the game's story, so spoilers appear in the description.
Alpha and beta builds
Files are labeled by channel, with alpha builds marked as unstable, and the latest file is an alpha release.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
How it compares
Origins: Undertale Yellow is open source under CC0 1.0 Universal, runs on Fabric for 1.18.2 – 1.21.1, and is server required with client optional. Undertale Origins Pack is not open source, is licensed All rights reserved, and targets only 1.20.1 on Fabric, with a server required and client optional environment.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| UnderFabric | Fabric | 1.16.4 – 1.16.5 | Client and server | 2021-04-11 |
| Origins: Undertale Yellow | Fabric | 1.18.2 – 1.21.1 | Server required, client optional | 2025-12-22 |
| Undertale Origins Pack | Fabric | 1.20.1 | Server required, client optional | 2024-04-23 |
Questions
Does UnderFabric need to be installed on the server?
In the catalog
UnderFabric is one of 7,216 Magic mods on ModsFinder, and one of 3,630 Magic mods for Fabric. 5,992 mods support Minecraft 1.16.5.
More from Just-Leah
Similar mods
What the author says
DISCLAIMER: This mod may contain spoilers from Undertale, currently mild, but will increase further down the line. If you want to follow this, and don’t want the spoilers, I suggest you try out Undertale for yourself (preferably all 3 routes, but if you don’t want to do them all that is ok as well) # UnderFabric…
Official listing
- Modrinth page
- modrinth.com/mod/underfabric
- Owner
- Just-Leah
- Published
- 2021-03-19
- Updated on Modrinth
- 2021-04-11
- Facts verified
- 2026-10-15