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    2,024,305 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 24 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 24 Oct 2026.269,486 projects gradedProjects with a letter from A to F. Counted on 24 Oct 2026.
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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    Cataclysm Zombie Apocalypse

    Modpack

    Survive mutated zombies, explore dungeons, and build up your gear.

    65%Modpack: 65% of its graded mods are A or Bof mods A or B
    • Overview65%
    • SecurityPartly checked
    • Privacy8 send data
    • AIIn 29 mods
    • CompatibilityUp to 1.21.1
    • ReleasesLatest 14 Sep

    Download

    Cataclysm NeoForge Minimal 1.21.1-2.0.0.zip

    Released 14 Sep 2026 · 1.6 MB

    Partly checked: 331 of 352 projects checked (21 not checked yet). See Security

    Open on CurseForge
    OverviewSecurityPrivacyAICompatibilityReleases

    Mod grades

    How grades work

    Modpacks get no grade of their own, so we show the grades of its mods. Of its 351 graded mods, 227 are graded A or B, 91 C and 33 D to F. Its last update came out 6 weeks ago, for Minecraft 1.21.1. See the mods

    Images

    • Cataclysm_Zombie_Apocalypse
    • 2024-06-15_13.12.31.png
    • 2024-06-15_13.04.48.png
    • 2024-06-15_13.12.55.png
    • Zombies
    • 2024-06-15_13.10.26.png
    • 2024-06-15_13.12.14.png
    • 2024-06-15_13.09.41_2.png
    • 2024-06-15_13.11.49.png
    • 2024-06-15_13.06.57.png
    • 2024-06-15_13.31.29.png
    • 2024-06-15_13.31.53.png
    • 2024-06-15_13.31.42.png

    About

    Cataclysm Zombie Apocalypse is a high-difficulty survival RPG modpack centered on surviving a world overrun by mutated infected, scarce resources, and escalating danger. Threats include maggot-ridden zombies, bot-fly carriers, and toxin-exploders, alongside environmental infection hazards and nighttime escalation events. Players can fight with firearms, attachments, and crafted ammunition, then develop their characters through leveling, skill upgrades, and improved weapons, tools, and gear. Exploration and risk bring opportunities to raid massive dungeons, discover hidden structures, face dangerous world events, and seek elite loot. The pack also has a public multiplayer server for survivors to team up, form alliances, and face its demanding world together.

    Written from CurseForge . How we write it

    Content of this pack331 of 352 checked

    The mods of its newest release (Minecraft 1.21.1 · NeoForge, 14 Sep 2026). Each check result is for the latest files of that mod, which may not be the version in this pack.

    ProjectGradeSecurity
    Just Enough Items (JEI)Mod · 725.1M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Cloth Config APIMod · 569.3M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Mouse TweaksMod · 548.3M downloadsAPassedPassed: our checks found nothing harmful in the latest files.AppleSkinMod · 519.2M downloadsAPassedPassed: our checks found nothing harmful in the latest files.GeckolibMod · 500.6M downloadsAPassedPassed: our checks found nothing harmful in the latest files.BookshelfMod · 473M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Architectury APIMod · 460M downloadsAPassedPassed: our checks found nothing harmful in the latest files.ControllingMod · 441.6M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Entity CullingMod · 425.1M downloadsAPassedPassed: our checks found nothing harmful in the latest files.SodiumMod · 412.7M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Xaero's MinimapMod · 377.5M downloadsBPassedPassed: our checks found nothing harmful in the latest files.WaystonesMod · 354M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Jade 🔍Mod · 354M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Curios APIMod · 350M downloadsAPassedPassed: our checks found nothing harmful in the latest files.CollectiveMod · 342.5M downloadsAPassedPassed: our checks found nothing harmful in the latest files.PatchouliMod · 341.3M downloadsAPassedPassed: our checks found nothing harmful in the latest files.PlaceboMod · 340.7M downloadsAPassedPassed: our checks found nothing harmful in the latest files.ModernFixMod · 334.2M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Xaero's World MapMod · 330.9M downloadsBPassedPassed: our checks found nothing harmful in the latest files.ImmediatelyFastMod · 329.5M downloadsAPassedPassed: our checks found nothing harmful in the latest files.BalmMod · 329M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Puzzles LibMod · 291.5M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Sophisticated BackpacksMod · 272.2M downloadsAPassedPassed: our checks found nothing harmful in the latest files.[ETF] Entity Texture FeaturesMod · 272.2M downloadsAPassedPassed: our checks found nothing harmful in the latest files.YetAnotherConfigLib (YACL)Mod · 266.4M downloadsAPassedPassed: our checks found nothing harmful in the latest files.
    1 to 25 of 35212345…15
    Changes since the previous release · 32 added, 19 removed

    Compared with the release of 4 Sep 2026 for the same platform, Minecraft version and loader. We do not compare the versions of the mods yet.

    Added
    [TACZ] NPCsTaCZ TweaksCritter Armory[TaCZ] Curios For Ammo BoxYukami's Sophisticated Backpack Tab[UNOFFICIAL] TaCZ 1.21.1 NeoForge PortOre Vein MinerTACZ Turrets[TACZ] HUDcreatorTaCZ MechanicsArmor Series - FalloutConfigLib TXFnomorebook[TACZ] Refit | Recipe and Stats EditorSmooth FreeCamTACZ Auto FireTACZ Armed PiglinsTACZ Armed SkeletonsTACZ / Jade Compatibility |Timeless and classics Zero addonSophisticated Backpacks RS Bridge | Quick Deposit into Refined Storage NetworksSophisticated Backpacks: Sophisticated AdventuresTaCZ / Sophisticated Backpacks compatibility addon | ammo backpacksSophisticated Backpacks / Jade | CompatibilitySmart Refill | Refill your HotbarSmart Refill: Sophisticated Backpacks | compatThirdCrossNo Backpacks in Chest SlotHitchhikerRefined StoragePatchouliBetter Third PersonThird Person Shooting: Zero
    Removed
    Multi JumpZoni's War SuppliesLNE Archers Add-OnSpawnixPolyarmory: Combat CollectionS&C Leather ArmorsSkill Tree for Multi JumpColorful Armor BarImprovable SkillsArtifactsRandom Mob SizesEcologicsPlayer TemplateRunic ArsenalClean Swing Through GrassArchers (RPG Series)Better WeaponryBerserker (More RPG Classes)Forcemaster (More RPG Classes)
    Share graded A or B
    down 2 points

    Details

    Creator
    mimic_v1
    License
    Not listed
    Downloads
    33K
    Created
    27 Feb 2022
    Official page
    CurseForge

    Security

    No harmful code found in the projects we checked

    We checked 331 of its 352 projects, without running them.

    We have not checked the files in the pack itself yet (settings, scripts).

    Why we show this: a modpack installs the files of its mods, and each mod runs on your computer like any program. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: a modpack has no grade of its own, and each mod's result counts in that mod's grade.

    How we checked · 331 of 352 projects checked
    • Its projects
      See what is in this pack
      352 projects
    • Not checked yet
      21 projects not checked yet. They are in the list of this pack.
      21 projects
    • Files in the pack itself
      Not checked yet.

    Privacy

    8 mods send something about you

    We read the code of 320 of its 341 mods, without running it.

    Entity CullingCrash reportsCollectivePlayer ID[ETF] Entity Texture FeaturesPlayer nameNot Enough AnimationsCrash reportssparkUnknown dataLet Me DespawnUsage dataObservableUnknown dataPlasmo VoiceUsage data

    Why we show this: a modpack runs the code of its mods, and 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 · 320 of 341 mods read
    • Go online onlyTheir code contacts a web address, for example to check for updates, and sends nothing about you.
      BookshelfXaero's MinimapPlaceboXaero's World MapRhinoKubeJSCorgiLibIron FurnacesInventoryHUD+Open Parties and ClaimsSinytra ConnectorAlmanacCB MultipartPrickleHammerLibIron's LibSableChunks fade inDuplicationless[UNOFFICIAL] TaCZ 1.21.1 NeoForge PortStructureOverlaplessBandwidthOptimizerMobStackerMoreEventsJSImmersiveForestsCustomizable Entity Clear
      26 mods
    • Crash reports or usage dataTheir author declares crash reports or usage data on Modrinth, or such a service is named in their files. Reading their code did not show it.
      KubeJSdeclared by its authorIron's Libdeclared by its author
      2 mods
    • Send nothing
      Their code contacts no web address.
      286 mods
    • Not read yet
      We have not read their code yet.
      21 mods

    AI

    AI used in 29 of the 259 mods we checked

    We found an AI tool in them, or their authors declared AI content.

    82 mods are not checked yet.

    Just Enough Items (JEI)Claude CodeWaystonesClaude CodeJade 🔍GitHub Copilot (coding agent)ModernFixClaude CodePuzzles LibdeclaredRefined StorageClaude CodeBetterF3Claude CodeEasy AnvilsdeclaredInsaneLibClaude CodeOverflowing BarsdeclaredMutant MonstersdeclaredEnhanced AIClaude CodeShield APIdeclaredEmotecraft (Forge)Claude CodeDuplicationlessChatGPTBundle APIdeclaredBurnt + AdditionsdeclaredJaumldeclaredDimension Access ManagerClaude CodeBandwidthOptimizerChatGPTBeginner's DelightdeclaredRosettadeclaredDrop HighlighterdeclaredI DONT WANT PARTICLES!!!declaredJesus' TotemdeclaredSmart item deleter V2declaredSpell Powered WeaponsdeclaredThirdCrossdeclaredSaturation Potion on TimeChatGPT

    Made with AI: not checked yet

    We have not looked for AI tools in the pack itself yet.

    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 · 1 place read
    • Author on ModrinthA form on Modrinth where the author can declare AI content and AI features in the game. It is optional and most authors leave it empty.
      Not on Modrinth.
    • 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 in the description
      Changelogs not read yet
    • Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.
      Not read yet
    • Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.
      Not read yet

    Compatibility

    See all 80 files
    NeoForge
    Forge
    1.181.201.2126.1

    Point at or tap a version to see its loaders.

    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.352 projects, listed in the Overview tab.
    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. Most mods still use 1.21.1.

    80 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.1·NeoForge2.0.02.0.0 · Cataclysm NeoForge Minimal 1.21.1-2.0.0.zip·14 Sep 2026Partly checkedPartly checked: 331 of 352 projects checked (21 not checked yet).Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.2.51.2.5 · Cataclysm Release Forge Minimal 1.21.1-1.2.5.zip·4 Sep 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.2.41.2.4 · Cataclysm Release Forge Minimal 1.21.1-1.2.4.zipAlpha·1 Sep 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.2.31.2.3 · Cataclysm Release Forge Minimal 1.21.1-1.2.3.zipAlpha·31 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.2.21.2.2 · Cataclysm Release Forge Minimal 1.21.1-1.2.2.zipAlpha·30 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.2.21.2.2 · Cataclysm Release Forge1.21.1-1.2.2.zip·29 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.2.11.2.1 · Cataclysm Release Forge1.21.1-1.2.1.zip·23 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.2.01.2.0 · Cataclysm Release Forge1.21.1-1.2.0.zip·17 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.131.0.13 · Cataclysm Release Forge1.21.1-1.0.13.zip·11 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.121.0.12 · Cataclysm Release Forge1.21.1-1.0.12.zip·10 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.111.0.11 · Cataclysm Release Forge1.21.1-1.0.11.zip·9 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.101.0.10 · Cataclysm Release Forge1.21.1-1.0.10.zip·9 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.91.0.9 · Cataclysm Release Forge1.21.1-1.0.9.zip·9 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.81.0.8 · Cataclysm Release Forge1.21.1-1.0.8.zip·9 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.51.0.5 · Cataclysm Release Forge1.21.1-1.0.5.zip·8 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.41.0.4 · Cataclysm Release Forge1.21.1-1.0.4.zip·6 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.31.0.3 · Cataclysm Release Forge1.21.1-1.0.3.zip·6 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.21.0.2 · Cataclysm Release Forge1.21.1-1.0.2.zip·3 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.21.1·NeoForge1.0.11.0.1 · Cataclysm Release Forge1.21.1-1.0.1.zip·1 Aug 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1.20.1·Forge, NeoForge1.0.01.0.0 · Cataclysm Release Forge1.21.1-1.0.0.zip·30 Jul 2026Not checkedIts author does not let other sites download this file from CurseForge, so we cannot check it.Open this file on CurseForgeDownload not available hereIts author does not let other sites download this file. Get it on CurseForge: its logo in "Get it on" opens the file's page.
    1 to 20 of 801234