Undercraft/Deltacraft, The Undertale Mod
ModMeet Undertale characters, collect human souls, and explore new biomes.
- Security
- Passed
- Privacy
- None found
- Loaders
- Forge
- Minecraft versions
- Minecraft 1.16.5
Why gradeE
How grades workStrengths
Points lost
- No release in 4.9 years−26 points
- No file for a Minecraft version most modpacks use−9 points
- No source code link−7 points
- Under 5 million downloads−1 point
All 11 criteria
Maintenance
27 points lost0 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.4.9 years ago (14 Dec 2021) 0 / 12Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.1.16.5 on Forge. About 5.7 years behind popular modding versions. Latest Minecraft: 26.3. Abandoned: no release for 4.8 years; no file for a popular modding version.0 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.No release in the last 24 months 0 / 6Stability
Full points15 / 15Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.None of the 2 modpacks with two or more versions removed it 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not measured yet.Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.None 5 / 5Transparency
7 points lost0 / 7Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.Does not apply. Not counted for projects only on CurseForge.Popularity
1 point lost3 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.15,798 3 / 4Track record
8 points lost0 / 8AgeHow long the project has existed. It counts less when no new file came out recently.5.1 years, 10 releases 0 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file. See Security
17.5 of the 61 points that apply = 29 out of 100. The points above are rounded to whole numbers.
Images
About
Undercraft/Deltacraft brings characters, creatures, souls, and Deltarune-inspired biomes from the Undertale and Deltarune worlds into Minecraft. Its current content includes Frisk and other humans, Undertale monsters such as Sans, Mettaton, Mettaton EX, and Blooky, and the Undertale souls. Humans are rare mobs that can spawn in any biome, and obtaining a human's soul requires killing that human. Souls are dangerous to drop on the ground, so the mod advises storing them in a chest.
Written from CurseForge . How we write it
In-game changes
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.16.5.
Does not change the game's code directly.
Adds:
- 11 blocksDelta Forest Leaves, FunDoor, NOTPERMA Button, NOTPERMA Fence, NOTPERMA Fence Gate, DeltaForest Log, DeltaForest Planks, NOTPERMA Pressure Plate and 3 more. Blocks with their own name, checked against the block files.
- 27 itemsAnnoying Dog Spawn Egg, Blooky Spawn Egg, Justice Soul, Chara Spawn Egg, Courage Human Spawn Egg, Determination Soul, Flower The Flower, Frisk Spawn Egg and 19 more. Items with their own name, not counting blocks, checked against the item files.
- 16 mobsAnnoying Dog, Blooky, Chara, Courage Human, Frisk, Froggit, Integrity Human, Justice Human and 8 more. Creatures with their own name and a spawn egg or drops of their own.
- 2 biomesDeltarune Forest and Delta Mountain.
- 11 recipes
- 7 advancements
Counted from the files of the mod. Content made only in its code is not counted.
Keeps all of vanilla Minecraft's textures, models and sounds.
Details
- Creator
- inumis
- License
- Not known
- Downloads
- 16K
- Created
- 3 Oct 2021
- Official page
- CurseForge
Security
No harmful code found
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.16.5.
We checked its files and read their code, without running it.
Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.
How we checked
- FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.1 latest file. It is not for a recent Minecraft version, so the answer above is about it. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
- Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.Read without running it
- Looked for, not foundWe looked for these in the file and did not find them.The internet, folders outside the game, other programs, updating itself, the webcam or microphone, an AI service.
Privacy
We found nothing it sends
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.16.5.
We read its code without running it: it contacts no web address while you play.
Why we show this: 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
- Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.The code of its one file, for Minecraft 1.16.5. See each file in Releases
AI
No sign so far that AI was used to make it
We looked for AI tools in its description, files and images and found none.
We have not read its changelogs yet.
No sign of AI in the game
We found no AI service, AI library or AI model file in its code.
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.Not on Modrinth.
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found in the descriptionChangelogs not read yet
- Its filesCredits and texts in the files you download that name an AI tool.Nothing found
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Nothing found37 images read
- Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.No AI service, AI library or AI model file207 code files read
Compatibility
See all 10 filesPoint at or tap a version to see its loaders.
Modpacks using this project
Find modpacks with itModpacks that include Undercraft/Deltacraft, The Undertale Mod in at least one of their versions, most downloaded first.
Latest files
The newest file for each Minecraft version and loader. None is for a recent Minecraft version. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.