Undertale
ModpackPlay through an underground adventure with monsters, puzzles, and a story.
Mod grades
How grades workModpacks get no grade of their own, so we show the grades of its mods. Of its 36 graded mods, 31 are graded A or B, 3 C and 2 D to F. Its last update came out 17 months ago, for Minecraft 1.21. See the mods
Images
About
Undertale is a playable Minecraft recreation of the Undertale experience, bringing its story and encounters into a custom-built map. This installment covers the Ruins and Snowdin and includes 18 enemy types, five boss fights, 17 encounter types, eight routes, and the story, items, and Easter eggs. The map opens with an intro about humans and monsters, then follows the fallen human through the Underground, with scenes featuring Flowey, Froggit, the Dummy, and Vegetoids. In the Ruins, players encounter puzzles involving a middle road, leaves, and a pillar, alongside a Ruins City, a home to explore, and save points. The recreation also features customizable soul color, voice acting, and custom skins, models, builds, and animations.
Written from Modrinth . How we write it
Content of this pack
The mods of its newest release (Minecraft 1.21 · Fabric, 23 May 2025). Each check result is for the latest files of that mod, which may not be the version in this pack.
Cloth Config APIMod · 569.3M downloadsAPassed
Fabric APIMod · 527.1M downloadsAPassed
GeckolibMod · 500.6M downloadsAPassed
Architectury APIMod · 460M downloadsAPassed
SodiumMod · 412.7M downloadsAPassed
Iris ShadersMod · 337.4M downloadsAPassed
ModernFixMod · 334.2M downloadsAPassed
ImmediatelyFastMod · 329.5M downloadsAPassed
FancyMenuMod · 299.4M downloadsAPassed
KonkreteMod · 295.2M downloadsAPassed
[ETF] Entity Texture FeaturesMod · 272.2M downloadsAPassed
[EMF] Entity Model FeaturesMod · 252.9M downloadsAPassed
FerriteCoreMod · 243.7M downloadsAPassed
LithiumMod · 242.4M downloadsAPassed
Fabric Language KotlinMod · 218.7M downloadsAPassed
MelodyMod · 210.1M downloadsAPassed
Sodium ExtraMod · 181.1M downloadsAPassed
Chat HeadsMod · 172.4M downloadsAPassed
ContinuityMod · 145.1M downloadsAPassed
BSL ShadersShader · 122.1M downloadsAPassed
IndiumMod · 97.8M downloads-Passed
Text Placeholder APIMod · 91.6M downloadsAPassed
Model Gap FixMod · 89.8M downloadsCPassed
WorldEditMod · 78.4M downloadsBPassed
Cardinal Components APIMod · 53.1M downloadsAPassedChanges since the previous release
Compared with the release of 2 May 2025 for the same platform, Minecraft version and loader. Same mods in both. We do not compare the versions of the mods yet.
- Share graded A or B
- unchanged
Details
- Creators
- Clouser, Mortimer-Kerman, NoteBlockMatt and BluSpring
- License
- All rights reserved
- Downloads
- 177K
- Created
- 21 Apr 2025
- Official page
- Modrinth
- Links
- Source code , Issues
Security
No harmful code found in the projects we checked
We checked 37 of its 38 projects and the files in the pack itself, without running them.
Why we show this: a modpack installs the files of its mods, and each mod runs on your computer like any program. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: a modpack has no grade of its own, and each mod's result counts in that mod's grade.
How we checked
- Its projects38 projects
- Not checked yet1 project
- Files in the pack itself2,482 settings files, 1 resource, shader or data pack, 1,070 other files, 2 mod jars.
- Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.Nothing declared about your system outside the game.
Privacy
3 mods send something about you
We read the code of 36 of its 37 mods, without running it.
Why we show this: a modpack runs the code of its mods, and a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Go online onlyTheir code contacts a web address, for example to check for updates. We found nothing it sends about you.2 mods
- Send nothingTheir code contacts no web address.31 mods
- Not read yetWe have not read their code yet.1 mod
AI
AI used in 4 of the 36 mods we checked
We found an AI tool in them, or their authors declared AI content.
1 mod is not checked yet.
No sign so far that AI was used to make the pack itself
We looked for AI tools in its texts and found none.
We have not read its files, images and code history yet.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.No AI content declared.
- Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.Not read yet
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found3 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.Not read yet
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Not read yet
Compatibility
See all 3 filesPoint at or tap a version to see its loaders.