Subterranean Expansion | Cave Update
ModAdds natural cave formations and new underground environments to your world.
- Security
- Passed
- Privacy
- None found
- Runs on
- Client and server
- Loaders
- Forge, NeoForge
- Minecraft versions
- Up to 1.21.1
Why gradeB
How grades workStrengths
Points lost
- No source code link−7 points
- Releases in only 2 of the last 24 months−4 points
- Under 5 million downloads−1 point
All 11 criteria
Maintenance
4 points lost23 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.2 months ago (17 Aug 2026) 12 / 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.1.21.1 on NeoForge, 1.20.1 on Forge. 65% of the 993 popular NeoForge mods updated in the last 6 months also have files for 1.21.1. Latest Minecraft: 26.3. 9 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 2 of the last 24 months 2 / 6Stability
Full points22 / 22Removed 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.2 of the 32 modpacks with two or more versions removed it in a later one (6%) 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.No quick fix in 2 years 7 / 7Known 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 lost3 / 10Source 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.legacy.curseforge.com 3 / 3Popularity
1 point lost3 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.105,126 3 / 4Track record
Full points8 / 8AgeHow long the project has existed. It counts less when no new file came out recently.13 months, 8 releases 8 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files for recent Minecraft versions. See Security
58.5 of the 71 points that apply = 82 out of 100. The points above are rounded to whole numbers.
Images
About
Subterranean Expansion overhauls the Overworld’s underground by adding natural features and distinct cave environments to vanilla caves. Its stalagmites and stalactites come in stone, mossy stone, granite, diorite, andesite, deepslate, tuff, sandstone, deep sandstone, and calcite variants. Cave examples include ordinary stone caves with scattered formations and cobblestone, upper desert caves made of sandstone with sand patches, and lower desert caves made of deep sandstone. The frosted caves feature glaciers that can span many chunks and engulf mineshafts, while vanilla-stone-based stalagmites and stalactites are compatible with resource packs.
Written from Modrinth and CurseForge . How we write it
In-game changes
Changes the game's code in 2 areas: World generationChanges 2 game code files in this area: terrain, biomes and structures made when new land is created. and World renderingChanges 1 game code file in this area: drawing the terrain, sky, clouds and weather..
Adds:
- 82 blocksAndesite Stalactite, Andesite Stalagmite, Calcite Stalactite, Calcite Stalagmite, Chiseled Deep Sandstone, Cobbled Deep Sandstone, Cobbled Deep Sandstone Slab, Cobbled Deep Sandstone Stairs and 74 more. Blocks with their own name, checked against the block files.
- 34 recipes
- 3 sounds
Counted from the files of the mod. Content made only in its code is not counted.
Replaces 1 of vanilla Minecraft's world generation files.
Details
- Creators
- Desblivion and Sleepy_Souls
- License
- All rights reserved
- Downloads
- 105K
- Created
- 18 Sep 2025
- Official pages
- Modrinth , CurseForge
- Links
- Issues
Security
No harmful code found
We checked its files and read their code, without running it.
What it can do on your computer
- Creates settings files
- The mod keeps its settings in the config folder of your game, where you can change or delete them. 1 file in your config folder.
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.2 latest files: the newest file for each Minecraft version and loader. Both are for recent versions. 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
- 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.
- 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
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 both files, for recent Minecraft versions. See each file in Releases
- Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.Nothing declared about crash reports, usage data or advertisements.
AI
No sign that AI was used to make it
We looked for AI tools in its texts, files, images and sounds and found none.
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.No AI content or AI features declared.
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found16 changelogs read
- 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 found289 images read
- Sounds in its filesThe tags of the sound files in the files you download, where some AI music tools write their name.Nothing found6 sounds 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 file248 code files read
Compatibility
See all 8 filesPoint at or tap a version to see its loaders.
Modpacks using this project
Find modpacks with it41 modpacks include Subterranean Expansion | Cave Update in at least one of their versions. Here are the 30 most downloaded.
How to train your dragon - Together we map the world || HTTYD102K downloadslast version with it 19 Oct 2026
Beyond Tides64K downloadslast version with it 2 Jul 2026
Desecrated - Flesh and Blood47K downloadslast version with it 26 Oct 2026
Smooth Horizons - Curves of Nature5.9K downloadslast version with it 1 Mar 2026
Taltale Pack2.8K downloadslast version with it 9 Feb 2026
LuxeCraft SMP2.8K downloadslast version with it 25 Oct 2026
Freezing Aftermath924 downloadslast version with it 31 Jul 2026
Redacted II: Aerofactory821 downloadslast version with it 6 Sep 2026
Fear of normal720 downloadslast version with it 25 Oct 2026
Renovated II693 downloadslast version with it 18 Oct 2026Often in the same modpacks
Mods that modpacks often add together with Subterranean Expansion | Cave Update. Share: how many of the modpacks with Subterranean Expansion | Cave Update also have that mod.
BlueprintAModin 66% of the modpacks with Subterranean Expansion | Cave Update
AmendmentsAModin 61% of the modpacks with Subterranean Expansion | Cave Update
BadOptimizationsAModin 59% of the modpacks with Subterranean Expansion | Cave Update
sparkAModin 56% of the modpacks with Subterranean Expansion | Cave Update
Essential ModBModin 54% of the modpacks with Subterranean Expansion | Cave Update
Sodium Dynamic LightsCModin 51% of the modpacks with Subterranean Expansion | Cave Update
AI Improvements: Performance TuningAModin 51% of the modpacks with Subterranean Expansion | Cave Update
Sinytra ConnectorAModin 49% of the modpacks with Subterranean Expansion | Cave Update
AllTheLeaks (Memory Leak Fix)AModin 46% of the modpacks with Subterranean Expansion | Cave Update
Structure EssentialsAModin 46% of the modpacks with Subterranean Expansion | Cave UpdateLatest files
The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.