FxUndertale
A restoration mod aiming to integrate elements from Undertale into Minecraft. 还原向模组，旨在将Undertale中的内容融合进Minecraft中。
⬇ Download on Modrinth
FxUndertale
FxUndertale is a NeoForge mod for Minecraft 1.21.1, aiming to integrate characters from Undertale into the Minecraft world.
Currently only includes the Sans boss fight. You can find the Golden Corridor structure in savanna biomes to challenge Sans. Upon defeat, he will drop the Gaster Blaster item.
Required Dependencies (must be installed)
- FxLib 1.21.1 latest version
- GeckoLib 1.21.1 (4.8.4)
- Player Animation Library 1.4.1 + mc1.21.1
Planned Content
More boss characters and richer items
License This project is licensed under the MIT License.
This mod is a fan project inspired by UNDERTALE, created by Toby Fox.
FxUndertale 是一个 NeoForge 模组（Minecraft 1.21.1），旨在将Undertale中的角色融合到Minecraft世界中。
目前只包含Sans BOSS战，可在热带草原群系找到金色长廊结构，进行挑战，击败后会掉落GasterBlaster物品。
【前置模组（必须安装）】
- FxLib 最新版本
- GeckoLib 1.21.1 4.8.4
- Player Animation Library 1.4.1 + mc1.21.1
【计划中的内容】
- 更多 Boss 角色 与 更丰富的道具物品
【许可】 本项目使用 MIT 许可证。
本模组为《传说之下》的粉丝向作品，原作由 Toby Fox 创作。
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- 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 Modrinth — 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 fx-undertale-1.21.1-neoforge-1.1.0.jar — drop this file into the mods folder
- Download size: 750 KB
- Download link checked 8 Sept 2026 — working
These come from our own check of the pack file, not from the source page.