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    2,054,198 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 25 Oct 2026.636,163 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 25 Oct 2026.269,438 projects gradedProjects with a letter from A to F. Counted on 25 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Dea's Fission

    Mod

    A nuclear reactor that turns fuel into heat for your factory.

    A96/ 100
    • OverviewA
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityMinecraft 1.20.1
    • ModpacksIn 8
    • ReleasesLatest 2 Sep

    Download

    deafission-1.20.1-0.17.0.jar Beta

    Released 2 Sep 2026 · 413.3 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade A

    How grades work

    Strengths

    • Security checks passed
    • Public source code and issue tracker
    • Around for years

    Points lost

    • Releases in only 6 of the last 24 months−1 point
    • Releases replaced within 3 days to fix a problem−1 point
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      1 point lost26 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.8 weeks ago (2 Sep 2026) 12 / 12
      Supports 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.1.20.1 on Forge. 77% of the 516 popular Forge mods updated in the last 6 months also have files for 1.20.1. Latest Minecraft: 26.3. 9 / 9
      Regular 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 / 6

    • Stability

      1 point lost21 / 22
      Removed 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.1 of the 8 modpacks with two or more versions removed it in a later one (13%) 10 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.3 of its 21 releases in 2 years needed a quick fix (14%) See the 3 releases6 / 7
      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 / 5

    • Transparency

      Full points10 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.Bitbucket · Vazde/minecraft-fission 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.legacy.curseforge.com 3 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.484,102 3 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.13 months, 21 releases 8 / 8

    • Security

      Passed
      File 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
    Total96 / 100

    67.9 of the 71 points that apply = 96 out of 100. The points above are rounded to whole numbers.

    Images

    • Mk1 and partially disassembled Mk2
    • Reactor UI, and an example fuel cell
    • Central Monitor

    About

    Dea's Fission adds a customizable nuclear fission reactor for GregTech CEu Modern, designed to produce rare elements from less costly inputs and supply heat for industrial processes. The reactor comes in two multiblock sizes, accepts different fuels that leave depleted outputs, and can be configured with internal components that affect its stats, such as heat capacity. Fuel pellets generate heat each tick, and operating at higher heat consumes fuel faster while producing new elements more quickly; lower heat can favor fuel efficiency and hot-coolant production. The reactor retains heat and cools gradually on its own, while coolant-based operation converts input fluids into hotter outputs, such as water into steam or specialized coolants into hot variants for turbines. Its heat can also meet heat requirements for crafting recipes and serve as an alternative to the Electronic Blast Furnace. A heat-responsive renderer changes the reactor's appearance, and redstone output can report heat and installed fuel. The mod supports monitoring through ComputerCraft and GregTech's Central Monitor, and offers KubeJS support for recipes, fuel rods, and some component customization.

    Written from Modrinth . How we write it

    In-game changes

    Does not change the game's code directly.

    Adds 1 sound: Fission Loop.

    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.

    Details

    Creator
    Vazde
    License
    All rights reserved
    Downloads
    484K
    Created
    27 Sep 2025
    Official pages
    Modrinth , CurseForge
    Links
    Source code , 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.

    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 · Both latest files checked, last on 16 Oct 2026
    • 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 · Both files read
    • 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 · 6 places read
    • 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 found
      40 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 found
      23 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 found
      1 sound file 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
      123 code files read

    Compatibility

    See all 21 files
    Forge
    1.201.2126.126.3

    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.Needed in your game and on the server, or you cannot join.
    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.Nothing
    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.It has no file for Minecraft versions newer than 1.20.1. Many recently updated mods still support 1.20.1.

    Related projects

    Projects that need Dea's Fission to work.

    ProjectTypeDownloadsGrade
    Qilby Core-Mod297 downloads

    Modpacks using this project

    Find modpacks with it

    Modpacks that include Dea's Fission in at least one of their versions, most downloaded first.

    ModpackDownloadsLast version with it
    TerraFirmaGreg-Modern1.7M downloadslast version with it 21 Oct 2026Dr. Stone -Multiverse759 downloadslast version with it 24 Mar 2026Qilby Industries526 downloadslast version with it 14 Mar 2026Solar Apocalypse Infinity440 downloadslast version with it 1 Jul 2026Ein's TFG Fork114 downloadslast version with it 9 Jul 2026TFG-Custom103 downloadslast version with it 17 Jul 2026Mooses Ranked96 downloadslast version with it 28 Oct 2025Gregg Civilization58 downloadslast version with it 2 Oct 2026

    Latest 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.

    MinecraftLoaderVersionSecuritySendsRequires
    1.20.1·Forge0.17.00.17.0 · deafission-1.20.1-0.17.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge0.14.00.14.0 · deafission-1.20.1-0.14.0.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    21 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1The latest file for its Minecraft version and loader·Forge0.17.00.17.0 · deafission-1.20.1-0.17.0.jarBeta·2 Sep 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 413.3 KB
    1.20.1·Forge0.16.00.16.0 · deafission-1.20.1-0.16.0.jarBeta·16 Feb 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 410.3 KB
    1.20.1·Forge0.15.40.15.4 · deafission-1.20.1-0.15.4.jarBeta·7 Dec 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 405.7 KB
    1.20.1·Forge0.15.20.15.2 · deafission-1.20.1-0.15.2.jarAlpha·24 Nov 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Alpha · 403.7 KB
    1.20.1·Forge0.15.10.15.1 · deafission-1.20.1-0.15.1.jarAlpha·24 Nov 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Alpha · 403.7 KB
    1.20.1·Forge0.15.00.15.0 · deafission-1.20.1-0.15.0.jarAlpha·22 Nov 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Alpha · 401.0 KB
    1.20.1The latest file for its Minecraft version and loader·Forge0.14.00.14.0 · deafission-1.20.1-0.14.0.jar (main file)Beta·3 Nov 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 284.7 KB
    1.20.1·Forge0.13.30.13.3 · deafission-1.20.1-0.13.3.jarBeta·1 Nov 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 281.0 KB
    1.20.1·Forge0.13.20.13.2 · deafission-1.20.1-0.13.2.jarBeta·30 Oct 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 281.0 KB
    1.20.1·Forge0.13.10.13.1 · deafission-1.20.1-0.13.1.jarAlpha·28 Oct 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Alpha · 280.9 KB
    1.20.1·Forge0.13.00.13.0 · deafission-1.20.1-0.13.0.jar (main file)Beta·23 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 280.9 KB
    1.20.1·Forge0.12.00.12.0 · deafission-1.20.1-0.12.0.jarAlpha·16 Oct 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Alpha · 187.0 KB
    1.20.1·Forge0.11.20.11.2 · deafission-1.20.1-0.11.2.jar (main file)Beta·15 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 179.7 KB
    1.20.1·Forge0.11.00.11.0 · deafission-1.20.1-0.11.0.jarAlpha·8 Oct 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Alpha · 169.7 KB
    1.20.1·Forge0.10.10.10.1 · deafission-1.20.1-0.10.1.jar (main file)Beta·4 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 168.9 KB
    1.20.1·Forge0.10.00.10.0 · deafission-1.20.1-0.10.0.jarBeta·30 Sep 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 168.8 KB
    1.20.1·Forge0.9.00.9.0 · deafission-1.20.1-0.9.0.jarBeta·29 Sep 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 168.5 KB
    1.20.1·Forge0.8.20.8.2 · deafission-1.20.1-0.8.2.jarBeta·28 Sep 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 167.7 KB
    1.20.1·Forge0.8.00.8.0 · deafission-1.20.1-0.8.0.jarBeta·28 Sep 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 167.2 KB
    1.20.1·Forge0.7.10.7.1 · deafission-1.20.1-0.7.1.jarBeta·27 Sep 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 159.7 KB
    1 to 20 of 2112

    Quick fixes

    In the last 2 years, 3 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.3

    • deafission-1.20.1-0.13.3.jar1 Nov 2025Fixed reactor coolant cooling math when there is no coolant…
    • deafission-1.20.1-0.8.2.jar28 Sep 2025Stricter multiblock. Fixed config loading event on client-server scenarios…
    • deafission-1.20.1-0.7.1.jar27 Sep 2025Fixed inventory renderer shannanenigans I forgo r…