Subsurface
Mod11 new cave/underground biomes.
Why gradeA
How grades workStrengths
Points lost
- Releases in only 4 of the last 24 months−3 points
- No release in 4 months−2 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.4 months ago (23 Jun 2026) 11 / 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.26.2 on Fabric, Forge, NeoForge and Quilt. 15% or more of the popular mods updated in the last 6 months also have files for 26.2. 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 4 of the last 24 months 3 / 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 37 modpacks with two or more versions removed it in a later one (5%) 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
Full points10 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · EMD0123/Subsurface 7 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.planetminecraft.com 3 / 3Popularity
1 point lost3 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.100,740 3 / 4Track record
1 point lost7 / 8AgeHow long the project has existed. It counts less when no new file came out recently.3.1 years, 19 releases 7 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 4 latest files for recent Minecraft versions. See Security
64.7 of the 71 points that apply = 91 out of 100. The points above are rounded to whole numbers.
Images
About
Subsurface expands cave exploration with 11 underground biomes in the Overworld and Nether, which can generate within vanilla cave biomes to create hybrids and are compatible with almost all other datapacks and mods. In the Overworld, Icicle Caves beneath snowy non-mountain biomes feature ceiling and floor icicles, ice patches, and frozen aquifers; Sand Caves beneath deserts have sand and sandstone patches, including floating sand that can collapse; and Swamp Caves beneath swamps and mangrove swamps mix mushrooms, vines, clay, mud, water, dripleafs, and lily-pad aquifers. Underground Forests bring grass, oak trees, mushrooms, and vines below oak-generating biomes, while Underground Taigas add spruce and mega spruce trees, ferns, sweet berries, pumpkins, and mossy cobblestone rocks beneath spruce-generating biomes. Foliage Caves beneath jungles feature jungle and mega jungle trees, bamboo, ferns, vines, and muddy aquifers, sometimes with skylights near the surface; Fungal Caves beneath mushroom islands have mycelium, large and small mushrooms, hanging mushroom roots, and wall mushrooms. Coral Caves occur only in warm-ocean aquifers and water caves, where coral, kelp, and seagrass grow, while Mesa Caves add red sand, red sandstone, colored terracotta, and terracotta plateaus beneath mesa biomes. In the Nether, Soul Canyons in Nether Wastes and Soul Sand Valleys contain soul sand, soul soil, nether wart, soul fire, fossils, giant nether warts, and weeping vines; Quartz Canyons in crimson and warped forests feature giant quartz crystals and quartz ore in surrounding netherrack.
Written from Modrinth . How we write it
In-game changes
Does not change the game's code directly.
Adds 12 structures.
Counted from the names and data files in the mod, so the list may not be complete.
Keeps all of vanilla Minecraft's textures, models and sounds.
Often used with it
See all 30Details
- Creators
- EMD123 and Antoha256M
- License
- Apache License 2.0
- Downloads
- 101K
- Created
- 9 Sep 2023
- Official page
- Modrinth
- Links
- Source code , Issues
Security
No harmful code found
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.5 latest files: the newest file for each Minecraft version and loader. The answer above is about the 4 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 all 4 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 so far that AI was used to make it
We looked for AI tools in its texts, files and images and found none.
We have not read its code history 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.No AI content or AI features 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 found19 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.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 found2 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 file
Compatibility
See all 19 filesPoint at or tap a version to see its loaders.
Modpacks using this project
Find modpacks with it44 modpacks include Subsurface in at least one of their versions. Here are the 30 most downloaded.
dronko's dragon survival7.9K downloadslast version with it 28 Sep 2026
Better Than Beta7.7K downloadslast version with it 14 Aug 2025
Enhanced Minecraft 2.07.3K downloadslast version with it 3 Nov 2024
Actions++6.9K downloadslast version with it 7 Sep 2026
Affogato6K downloadslast version with it 14 May 2024
Deceivers & Dungeons (RPG Series)4.4K downloadslast version with it 25 Jan 2026
The Weed Whiz Pack3.5K downloadslast version with it 4 Jul 2024
Dracium Create Edition3.3K downloadslast version with it 12 May 2024
[DISCONTINUED] It's About The Journey2.8K downloadslast version with it 25 Nov 2024
eXplodVE2.7K downloadslast version with it 15 Apr 2024Often in the same modpacks
Mods that modpacks often add together with Subsurface. Share: how many of the modpacks with Subsurface also have that mod.
FerriteCoreAModin 91% of the modpacks with Subsurface
LithiumAModin 77% of the modpacks with Subsurface
Mod MenuAModin 75% of the modpacks with Subsurface
Dynamic FPSAModin 61% of the modpacks with Subsurface
Sodium ExtraAModin 59% of the modpacks with Subsurface
No Chat ReportsAModin 57% of the modpacks with Subsurface
Reese's Sodium OptionsAModin 55% of the modpacks with Subsurface
Enhanced Block EntitiesCModin 52% of the modpacks with Subsurface
Concurrent Chunk Management Engine (Fabric)AModin 52% of the modpacks with Subsurface
Dungeons and TavernsBModin 52% of the modpacks with SubsurfaceLatest 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.