FermiumMixins
ModFixes bugs and adds changes to your game and other mods.
Why gradeA
How grades workStrengths
Points lost
All 11 criteria
Maintenance
1 point lost26 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.5 days ago (19 Oct 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.1.12.2 on Forge. A version many modpacks still use. 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 7 of the last 24 months 5 / 6Stability
1 point lost21 / 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.5 of the 53 modpacks with two or more versions removed it in a later one (9%) 10 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.2 of its 15 releases in 2 years needed a quick fix (13%) See the 2 releases6 / 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 · fonnymunkey/FermiumMixins 7 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · fonnymunkey/FermiumMixins 3 / 3Popularity
Full points4 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.836,259 4 / 4Track record
Full points8 / 8AgeHow long the project has existed. It counts less when no new file came out recently.15 months, 15 releases 8 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in the latest file. See Security
68.9 of the 71 points that apply = 97 out of 100. The points above are rounded to whole numbers.
About
FermiumMixins is a general-purpose patch and tweak mod for vanilla Minecraft and modded setups, providing more than 170 changes that add features, improve performance, and fix bugs. Its patches cover a broad range of mods, including BetterNether, Biomes O’ Plenty, Quark, Lost Cities, Lycanites Mobs, Infernal Mobs, QualityTools, and Waystones, with further compatibility for mods such as Advanced Rocketry, Serene Seasons, and JEI. Examples include correcting Infernal Mobs’ health and ability behavior, fixing disappearing Lycanites Mobs drops and Waystones teleportation or reordering issues, and improving Quark’s chest search controls. Every tweak can be enabled or disabled in the configuration, and options are off by default to help maintain compatibility with other mods. It is intended for general modpack use and can be used alongside its sister mod RLMixins, which focuses on RLCraft.
Written from Modrinth and CurseForge . How we write it
In-game changes
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.12.2.
Changes the game's code in 13 areas: Mobs and their behaviorChanges 17 game code files in this area: mobs, animals, villagers, projectiles and how they move and act., Blocks and fluidsChanges 8 game code files in this area: how blocks, fluids and redstone work., Rendering and graphicsChanges 7 game code files in this area: drawing mobs, items, particles and textures on screen., Server and world logicChanges 6 game code files in this area: the world, commands, scoreboards, saved data and game rules., Networking and multiplayerChanges 5 game code files in this area: connections, the server list and what is sent between your game and a server., Inventory and itemsChanges 5 game code files in this area: items, chests and other containers, crafting and enchanting., World generationChanges 4 game code files in this area: terrain, biomes and structures made when new land is created., User interfaceChanges 4 game code files in this area: menus, screens, tooltips, the chat window and the in-game overlay., Chunk loading and storageChanges 3 game code files in this area: how the game loads, tracks, saves and unloads chunks., Game data and resourcesChanges 2 game code files in this area: recipes, tags, advancements, language files and other game data., Game coreChanges 2 game code files in this area: the main loop, lighting and other code the whole game uses., PlayerChanges 1 game code file in this area: your character: movement, abilities, hunger and controls. and Other game codeChanges 5 game code files in this area: game code that is not in one of the areas above..
Adds 2 sounds: Flare Burn and Flare Shoot.
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
- fonnymunkey and Nischhelm
- License
- All rights reserved
- Downloads
- 836K
- Created
- 10 Jul 2025
- Official pages
- Modrinth , CurseForge
- Links
- Source code , Issues , Discord
Security
No harmful code found
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.12.2.
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. 2 files 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.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
- 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
It has no file for a recent Minecraft version. This is about its files for Minecraft 1.12.2.
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 1.12.2. 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, sounds 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 found30 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
- Sounds in its filesThe tags of the sound files in the files you download, where some AI music tools write their name.Nothing found2 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 file398 code files read
Compatibility
See all 15 filesPoint at or tap a version to see its loaders.
Modpacks using this project
Find modpacks with it| Oct 2024 | 0 |
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More modpacks put it in their new versions than a year ago: 6 a month now, 4 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..
54 modpacks include FermiumMixins in at least one of their versions. Here are the 30 most downloaded.
RLCraft Dregora2.1M downloadslast version with it 2 Dec 2025
Jurassic World Reborn II438K downloadslast version with it 9 Aug 2025
Bleach Evolved247K downloadslast version with it 19 Oct 2026
Zombie Apocalypse: Reborn71K downloadslast version with it 11 Jul 2026
TREPIDATION - Story-driven Horror Roguelite62K downloadslast version with it 23 Jun 2026
Dimension Hopper: The Fall62K downloadslast version with it 18 Jul 2025
Lukes Paradise Parasites43K downloadslast version with it 30 Nov 2025
Optimized fps legacy [FORGE]35K downloadslast version with it 2 Aug 2025
Adventure Life - New Life17K downloadslast version with it 3 Aug 2025
prehistoric park The Great Adventure7.7K downloadslast version with it 18 Jan 2026Often in the same modpacks
Mods that modpacks often add together with FermiumMixins. Share: how many of the modpacks with FermiumMixins also have that mod.
Particle CullingCModin 87% of the modpacks with FermiumMixins
AlfheimCModin 72% of the modpacks with FermiumMixins
VintageFixAModin 72% of the modpacks with FermiumMixins
Universal TweaksAModin 72% of the modpacks with FermiumMixins
NoiseThreaderBModin 67% of the modpacks with FermiumMixins
Aqua Acrobatics [Forge]DModin 67% of the modpacks with FermiumMixins
Entity CullingDModin 67% of the modpacks with FermiumMixins
FermiumASMCModin 65% of the modpacks with FermiumMixins
Roughly Enough IDsBModin 63% of the modpacks with FermiumMixins
YUNG's Better CavesAModin 57% of the modpacks with FermiumMixinsLatest 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.
15 releases
Quick fixes
In the last 2 years, 2 releases needed a quick fix: a new release within 3 days to fix a problem. This lowers the grade by 1 point.
See them, newest first
Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.2
- FermiumMixins-1.0.4.jar1.0.4: Add fix for quark monster box performance by Nischhelm Rewrite…
- FermiumMixins-1.0.1.jar1.0.1: Fix missing refmap