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    2,056,262 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 2026.269,829 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.

    Zombie Apocalypse Core [ZAC]

    Mod

    Adds tougher zombies that break blocks and resist daylight.

    A92/ 100
    Security
    Passed
    Privacy
    None found
    Runs on
    Client and server
    Loaders
    Fabric, Forge, NeoForge
    Minecraft versions
    Up to 1.21.1
    • OverviewA
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 1.21.1
    • ModpacksIn 11
    • ReleasesLatest 23 Oct

    Download

    zac-1.2.0-fabric-mc1.21.1.jar

    Released 23 Oct 2026 · 462.6 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade A

    How grades work

    Strengths

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

    Points lost

    • Releases in only 3 of the last 24 months−4 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      4 points lost23 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.2 days ago (23 Oct 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.1.21.1 on Fabric and NeoForge, 1.20.1 on Forge. 53% of the 718 popular Fabric mods updated in the last 6 months also have files for 1.21.1. 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 3 of the last 24 months 2 / 6

    • Stability

      Full points15 / 15
      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 3 modpacks with two or more versions removed it in a later one (33%) 10 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.Not measured yet.
      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.GitHub · ricedeity342/zacmod 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · ricedeity342/zacmod 3 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.47,026 3 / 4

    • Track record

      Full points8 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.12 months, 12 releases 8 / 8

    • Security

      Passed
      File 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
    Total92 / 100

    59 of the 64 points that apply = 92 out of 100.

    About

    Zombie Apocalypse Core adds configurable systems for building zombie-apocalypse gameplay, including a day counter, controls that multiply selected entities or prevent listed entities from spawning, and daylight resistance that can keep selected mobs such as zombies from burning in sunlight. It also lets zombies break blocks while pursuing players, with settings for their block-breaking reach and the range of block hardness they can break, and includes an option for heavily armored zombies. You can configure extra zombie drops with item-specific chances, such as rotten flesh, bones, carrots, potatoes, and iron or gold nuggets; these are added alongside the default zombie loot table.

    Written from Modrinth . How we write it

    In-game changes

    Changes the game's code in 1 area: Mobs and their behaviorChanges 1 game code file in this area: mobs, animals, villagers, projectiles and how they move and act..

    Adds no new blocks, items or other content.

    Keeps all of vanilla Minecraft's textures, models and sounds.

    Details

    Creator
    rd342
    License
    GNU General Public License v3.0 only
    Downloads
    47K
    Created
    26 Oct 2025
    Official page
    Modrinth
    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

    Connects to the internet
    It has code that can go online, for example to check for updates, load skins or send crash reports. Only in its files for Fabric 1.20.1 to 1.21.1. See Privacy
    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 · All 4 latest files checked, last on 23 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.
      4 latest files: the newest file for each Minecraft version and loader. All 4 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.
      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 · All 4 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 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 · 5 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.
    • 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 found
      12 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
    • 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
      24 code files read

    Compatibility

    See all 12 files
    Fabric
    NeoForge
    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 1.21.1. Many recently updated mods still support 1.21.1.

    Modpacks using this project

    Find modpacks with it

    Modpacks that include Zombie Apocalypse Core [ZAC] in at least one of their versions, most downloaded first.

    ModpackDownloadsLast version with it
    [EPSE]Ember Peril: Silent Expanse27K downloadslast version with it 14 Jun 2026WarZ8.2K downloadslast version with it 2 Nov 2025Fallout: Create7.5K downloadslast version with it 10 Dec 2025ZombieApocalypseSurvival2.1K downloadslast version with it 5 Jul 2026zombiE1.6K downloadslast version with it 27 Sep 2026Cataclysm Z1.2K downloadslast version with it 9 Sep 2026Create: Winter Apocalypse589 downloadslast version with it 4 Nov 2025Create Zombie Apocalypse554 downloadslast version with it 22 Jun 2026GM's Optimized Neoforge532 downloadslast version with it 15 Jun 2026Infection Overdrive379 downloadslast version with it 5 Dec 2025
    1 to 10 of 1112

    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
    1.21.1·Fabric1.2.01.2.0 · zac-1.2.0-fabric-mc1.21.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1·NeoForge1.2.01.2.0 · zac-1.2.0-neoforge-mc1.21.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Fabric1.2.01.2.0 · zac-1.2.0-fabric-mc1.20.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.2.01.2.0 · zac-1.2.0-forge-mc1.20.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    12 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1The latest file for its Minecraft version and loader·Fabric1.2.01.2.0 · zac-1.2.0-fabric-mc1.21.1.jar (main file)·23 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthDownload · Stable · 462.6 KB
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.2.01.2.0 · zac-1.2.0-neoforge-mc1.21.1.jar (main file)·23 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthDownload · Stable · 33.6 KB
    1.20.1The latest file for its Minecraft version and loader·Fabric1.2.01.2.0 · zac-1.2.0-fabric-mc1.20.1.jar (main file)·23 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthDownload · Stable · 459.6 KB
    1.20.1The latest file for its Minecraft version and loader·Forge1.2.01.2.0 · zac-1.2.0-forge-mc1.20.1.jar (main file)·23 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthDownload · Stable · 35.4 KB
    1.21.1·Fabric1.1.01.1.0 · zac-1.1.0.jar (main file)·12 Nov 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthDownload · Stable · 442.6 KB
    1.21.1·NeoForge1.1.01.1.0 · zac-1.1.0.jar (main file)·12 Nov 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthDownload · Stable · 20.0 KB
    1.20.1·Fabric1.1.01.1.0 · zac-1.1.0.jar (main file)·12 Nov 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthDownload · Stable · 442.5 KB
    1.20.1·Forge1.1.01.1.0 · zac-1.1.0.jar (main file)·12 Nov 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthDownload · Stable · 21.3 KB
    1.21.1·Fabric1.0.01.0.0 · zac-1.0.0.jar (main file)·27 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthDownload · Stable · 429.8 KB
    1.21.1·NeoForge1.0.01.0.0 · zac-1.0.0.jar (main file)·27 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthDownload · Stable · 17.3 KB
    1.20.1·Fabric1.0.01.0.0 · zac-1.0.0.jar (main file)·27 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthDownload · Stable · 429.7 KB
    1.20.1·Forge1.0.01.0.0 · zac-1.0.0.jar (main file)·26 Oct 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthDownload · Stable · 17.8 KB