Underground Rivers
ModAdds underground rivers that flow through your world's caves.
A96/ 100
Why gradeA
How grades workStrengths
Points lost
- No release in 3 months−1 point
- Releases in only 6 of the last 24 months−1 point
All 11 criteria
Maintenance
2 points lost25 / 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 (10 Jul 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 NeoForge and Fabric, 1.21.6 on Forge. 55% of the 995 popular NeoForge 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 6 of the last 24 months 5 / 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.34 of the 346 modpacks with two or more versions removed it in a later one (10%) 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 · Apollounknowndev/smaller-projects 7 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · Apollounknowndev/underground-rivers 3 / 3Popularity
Full points4 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.4,240,274 4 / 4Track record
Full points8 / 8AgeHow long the project has existed. It counts less when no new file came out recently.2.1 years, 21 releases 8 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 12 latest files for recent Minecraft versions. See Security
Total96 / 100
68.5 of the 71 points that apply = 96 out of 100. The points above are rounded to whole numbers.
Images
About
Underground Rivers is a world-generation mod that adds underground rivers to vanilla terrain without otherwise changing it. The rivers are a ground-up rewrite, with more varied layouts and improved entrances. It is designed to work alongside other world-generation mods, including Biomes O' Plenty, Nature's Spirit, and Terralith.
Written from Modrinth and CurseForge . How we write it
In-game changes
Does not change the game's code directly.
Adds no new blocks, items or other content.
Keeps all of vanilla Minecraft's textures, models and sounds.
Often used with it
See all 30Details
- Creator
- Apollo
- License
- MIT License
- Downloads
- 4.2M
- Created
- 23 Sep 2024
- Official pages
- Modrinth , CurseForge
- Links
- Source code , Issues , Discord
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.12 latest files: the newest file for each Minecraft version and loader. All 12 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 all 12 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 code history 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.
- Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.Nothing found
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found35 of 36 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 found1 image 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 21 filesFabric
NeoForge
Forge
Point at or tap a version to see its loaders.
Runs onWhere to install it: in your game, on the server, or both. As the author says on Modrinth.Install it on the server. Players join without installing it. It also works in singleplayer.
RequiresProjects you must also install for it to work. From the author's lists for its files for recent Minecraft versions, or from its project page.
OptionalProjects it can work with but does not need. The author lists them.Nothing
IncludesProjects packed inside its files.Nothing
Speed of updatesHow fast it gets a file for new Minecraft versions, on average, compared with similar projects. Not part of the grade.Faster than most mods. On average, it gets a file 25 days after a new Minecraft version comes out. Measured on the last 5 Minecraft versions. No file yet for Minecraft 26.3.
Modpacks using this project
Find modpacks with it| Oct 2024 | 2 |
|---|---|
| Nov 2024 | 0 |
| Dec 2024 | 4 |
| Jan 2025 | 13 |
| Feb 2025 | 17 |
| Mar 2025 | 25 |
| Apr 2025 | 23 |
| May 2025 | 25 |
| Jun 2025 | 32 |
| Jul 2025 | 40 |
| Aug 2025 | 50 |
| Sep 2025 | 53 |
| Oct 2025 | 50 |
| Nov 2025 | 55 |
| Dec 2025 | 61 |
| Jan 2026 | 62 |
| Feb 2026 | 56 |
| Mar 2026 | 58 |
| Apr 2026 | 59 |
| May 2026 | 54 |
| Jun 2026 | 59 |
| Jul 2026 | 59 |
| Aug 2026 | 69 |
| Sep 2026 | 59 |
More modpacks put it in their new versions than a year ago: 60 a month now, 37 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..
467 modpacks include Underground Rivers in at least one of their versions. Here are the 30 most downloaded.
Beyond Depth3.4M downloadslast version with it 18 Oct 2026
MC Eternal 21.9M downloadslast version with it 16 Sep 2026
Beyond Cosmo525K downloadslast version with it 18 Oct 2026
Concatenation162K downloadslast version with it 21 Sep 2026
Beyond Ocean137K downloadslast version with it 15 Oct 2026
Infinity Legacy II109K downloadslast version with it 11 Feb 2026
Better MC [BMC6]108K downloadslast version with it 14 Oct 2026
Zombie REAP Plague Against Your World.107K downloadslast version with it 23 Sep 2026
Protocol Zero - A Modern Zombie Apocalypse 101K downloadslast version with it 22 Jun 2026
Medieval Immersed78K downloadslast version with it 10 Sep 2026Often in the same modpacks
Mods that modpacks often add together with Underground Rivers. Share: how many of the modpacks with Underground Rivers also have that mod.
AmendmentsAModin 61% of the modpacks with Underground Rivers
sparkAModin 53% of the modpacks with Underground Rivers
BlueprintAModin 49% of the modpacks with Underground Rivers
AttributeFixAModin 49% of the modpacks with Underground Rivers
Sodium Dynamic LightsCModin 48% of the modpacks with Underground Rivers
Chat HeadsAModin 47% of the modpacks with Underground Rivers
BadOptimizationsAModin 47% of the modpacks with Underground Rivers
Packet FixerAModin 46% of the modpacks with Underground Rivers
What Are They Up To (Watut)BModin 45% of the modpacks with Underground Rivers
fix GPU memory leakAModin 45% of the modpacks with Underground RiversLatest 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.
26.2FabricPassedOur checks found nothing harmful in this file. Its code was read too.
26.2NeoForgePassedOur checks found nothing harmful in this file. Its code was read too.
26.1 to 26.1.2FabricPassedOur checks found nothing harmful in this file. Its code was read too.
26.1 to 26.1.2NeoForgePassedOur checks found nothing harmful in this file. Its code was read too.
1.21.11FabricPassedOur checks found nothing harmful in this file. Its code was read too.
1.21.7FabricPassedOur checks found nothing harmful in this file. Its code was read too.
1.21.7NeoForgePassedOur checks found nothing harmful in this file. Its code was read too.
1.20.1 to 1.21.6Fabric, NeoForge, ForgePassedOur checks found nothing harmful in this file. Its code was read too.
1.21.1FabricPassedOur checks found nothing harmful in this file. Its code was read too.
1.21.1NeoForgePassedOur checks found nothing harmful in this file. Its code was read too.
21 releases
26.2The latest file for its Minecraft version and loaderNeoForgePassedOur checks found nothing harmful in this file. Its code was read too.
26.2The latest file for its Minecraft version and loaderFabricPassedOur checks found nothing harmful in this file. Its code was read too.
26.1 to 26.1.2The latest file for its Minecraft version and loaderNeoForgePassedOur checks found nothing harmful in this file. Its code was read too.
26.1 to 26.1.2The latest file for its Minecraft version and loaderFabricPassedOur checks found nothing harmful in this file. Its code was read too.
1.21.1The latest file for its Minecraft version and loaderNeoForgePassedOur checks found nothing harmful in this file. Its code was read too.
1.21.1The latest file for its Minecraft version and loaderFabricPassedOur checks found nothing harmful in this file. Its code was read too.
1.21.11The latest file for its Minecraft version and loaderFabricPassedOur checks found nothing harmful in this file. Its code was read too.
1.21.1 to 1.21.7The latest file for its Minecraft version and loaderNeoForgePassedOur checks found nothing harmful in this file. Its code was read too.
1.21.7The latest file for its Minecraft version and loaderFabricPassedOur checks found nothing harmful in this file. Its code was read too.
1.21.1The latest file for its Minecraft version and loaderNeoForgePassedOur checks found nothing harmful in this file. Its code was read too.
1.20.1The latest file for its Minecraft version and loaderForgePassedOur checks found nothing harmful in this file. Its code was read too.
1.20.1The latest file for its Minecraft version and loaderFabricPassedOur checks found nothing harmful in this file. Its code was read too.