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    2,068,923 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 26 Oct 2026.645,711 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 26 Oct 2026.270,466 projects gradedProjects with a letter from A to F. Counted on 26 Oct 2026.

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    © 2026 ModgradeNot an official Minecraft product. Not approved by or associated with Mojang or Microsoft.

    The Underground Infection

    Modpack

    A Virus has taken over the world and gets stronger every day but wait there is a deep dark virus waiting underground for activation by the most skilled of players.

    Download

    Files come from CurseForge servers.

    The Underground Infection.zip

    Released 27 Jan 2026 · 633.5 KB

    Not checked: its author does not let other sites download this file from CurseForge, so we cannot check it.

    A newer beta from 29 Jan 2026 is in Releases.

    Open on CurseForge
    75%Modpack: 75% of its graded mods are A or Bof mods A or B
    Security
    Partly checked
    Privacy
    5 send data
    Loaders
    Forge
    Minecraft versions
    Minecraft 1.20.1
    • Overview75%
    • SecurityPartly checked
    • Privacy5 send data
    • AINot checked yet
    • CompatibilityMinecraft 1.20.1
    • ReleasesLatest 29 Jan
    OverviewSecurityPrivacyAICompatibilityReleases

    Mod grades

    How grades work

    Modpacks get no grade of their own, so we show the grades of its mods. Of its 202 graded mods, 151 are graded A or B, 39 C and 12 D to F. Its last update came out 9 months ago, for Minecraft 1.20.1. See the mods

    Content of this pack200 of 203 checked

    The mods of its newest release (Minecraft 1.20.1 · Forge, 29 Jan 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 · 725.9M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Cloth Config APIMod · 570.7M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Mouse TweaksMod · 548.9M downloadsAPassedPassed: our checks found nothing harmful in the latest files.AppleSkinMod · 520.1M downloadsAPassedPassed: our checks found nothing harmful in the latest files.GeckolibMod · 501.3M downloadsAPassedPassed: our checks found nothing harmful in the latest files.BookshelfMod · 473.4M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Architectury APIMod · 460.8M downloadsAPassedPassed: our checks found nothing harmful in the latest files.ControllingMod · 441.9M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Entity CullingMod · 427.6M downloadsAPassedPassed: our checks found nothing harmful in the latest files.ClumpsMod · 420.8M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Curios APIMod · 350.3M downloadsAPassedPassed: our checks found nothing harmful in the latest files.CollectiveMod · 343.1M downloadsAPassedPassed: our checks found nothing harmful in the latest files.PatchouliMod · 341.5M downloadsAPassedPassed: our checks found nothing harmful in the latest files.PlaceboMod · 340.8M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Moonlight LibMod · 338.7M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Enchantment DescriptionsMod · 337.8M downloadsAPassedPassed: our checks found nothing harmful in the latest files.ImmediatelyFastMod · 331.7M downloadsAPassedPassed: our checks found nothing harmful in the latest files.BalmMod · 330.4M downloadsAPassedPassed: our checks found nothing harmful in the latest files.FancyMenuMod · 299.8M downloadsAPassedPassed: our checks found nothing harmful in the latest files.KonkreteMod · 295.6M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Puzzles LibMod · 292.9M downloadsAPassedPassed: our checks found nothing harmful in the latest files.CreativeCoreMod · 285.1M downloadsAPassedPassed: our checks found nothing harmful in the latest files.ComfortsMod · 277.4M downloadsAPassedPassed: our checks found nothing harmful in the latest files.[ETF] Entity Texture FeaturesMod · 273.8M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Sophisticated BackpacksMod · 272.9M downloadsAPassedPassed: our checks found nothing harmful in the latest files.
    1 to 25 of 20312345…9

    3 files not listed: no matching project found.

    Changes since the previous release · 152 added, 72 removed

    Compared with the release of 27 Jan 2026 for the same platform, Minecraft version and loader. We do not compare the versions of the projects yet.

    Added
    Miscellaneous Metals (Formerly Marbled's Core)UniLib[Let's Do Addon] EMI CompatFragmented TotemAiycratesTxniLibLot' a Melees (Formerly Marbled's Melees)AlmanacCorpse x Curios API CompatCrash AssistantItem ScrapperDistraction Free Recipes (EMI / REI / JEI)Improved Village PlacementMedical Remedies (Formerly Marbled's First Aid)CurseForge project 1196357Data AnchorSimple Snowy Fix (Forge / Fabric)Keerdm's BinocularsStructure ControlCubic LeavesMob ControlBaguetteLibItem Scrapper Pack - Armor & ToolsItem Scrapper Pack - TACZTax' Cursed Painter[SBW] Source Vehicle PackCurseForge project 1383935[SBW/TACZ]TacticalDustFXJust Enough Resources (JER)Inventory SorterShoulder Surfing ReloadedJust Another Rotten Flesh to Leather ModAppleSkinEnchantment DescriptionsAmbientSoundsEnhancedVisualsIn Control!CreativeCoreTool BeltVoid FogToast ControlU Team CoreCarry OnSatakoPlaceboSerene SeasonsCraftPresenceProject: Vibrant JourneysTipsPatchouliTenshiLibCharm of UndyingAmbient EnvironmentCollectiveOpen LoaderLootrDecorative BlocksFancyMenuStructure Gel APIAgeing SpawnersYUNG's Better MineshaftsStarter KitFirst Join MessageConfigurable Extra Mob DropsGame Menu Remove GFARBYUNG's APINot Enough AnimationsEnhanced CelestialsEntity CullingNo Villager Death MessagesRightClickHarvestFresh AnimationsAtlas LibInsaneLibFastSuiteThe HordesMy Server Is CompatibleFlan (Forge, NeoForge)Puzzles LibScaling Mob DifficultyDrippy Loading ScreenSimple ShopsMap Atlases [Forge]Forgiving World - Dimension StackingWe Got Runners!Sound Physics RemasteredHandcraftedResponsive Shields[ETF] Entity Texture FeaturesPhilips RuinsResourceful LibEcologicsEating AnimationsEMIOculusNecronomicon APIAuudio [Forge]JamLibSky's Overworld NetheriteBetter Block SoundsSmooth Boot (Reloaded)AutomobilityplayerAnimatorSmartBrainLibGroovyModLoader (GML)Let Me DespawnCombatlogImmersive AircraftCombat RollGolems Are Friends Not FodderImmediatelyFastPacket FixerCoFH CoreCW Gun ExpansionNot Enough Recipe Book [NERB]Marbled's Arsenal (Legacy)Extra Zombie DropsGlidersItem ObliteratorAthena[EMF] Entity Model FeaturesMutant Monsters[Let's Do] APISpice of Life OnionPanda's Falling TreesCreate: NetherlessFast PaintingsZombie Infection VaccineApothic AttributesDynamic LightsEuphoria PatchesShatterLib | OctoLibAccess DeniedExperimental Settings DisablerNo Startup Messages PleaseCurseForge project 930207LithostitchedExtra GoreWhat Are They Up To (Watut)Pillager's GunGlobal Narration ToggleBadOptimizations[Let's Do] HerbalBrewsGlitchCoreVic's Point Blank[Let's Do] BloomingNatureThird Person Shooting: ZeroTemporal APIPandaLibXray SnitchThe Deep VoidBuilding But Better
    Removed
    Chest LoggerTCT CoreTCT ClearLagOh The Biomes We've GoneFPS BoostAnCore LibInfection Z: Last apocalypseSodium Options APISimple Items Zombie ApocalypseFPS OptimizerBerezkas libraryDoomsday DecorationMutants and ZombiesChaosZPack [Lost Cities] Abandoned / Zombie ApocalypseEssential ApocalypseSurvival InstinctChaosZProject: Bandits! - Pillager's Gun AddonZombie VariantsFasterZombiesLC²H [Lost Cities: Multithreaded]Falling Blocks FPS FixChaosZPack Remastered: Structures ! [Watchtowers]Easy CraftTweakerDoomsday translationQuantified APILagless: FPS OptimizerNature's CompassValkyrien SkiesXaero's MinimapChunk-PregeneratorHardcore RevivalSpartan WeaponryFPS ReducerFabric APIMineTrapsTissou's Zombie PackXaero's World MapDefault Dark ModeCrash UtilitiesMotschen's Better LeavesSimple PlanesZombie ExtremeVanishmodLuckPermsSuperMartijn642's Config LibCreate Crafts & AdditionsConnectivityHorror Element ModSculk HordeBetter Fps - Render DistanceSodium Dynamic LightsJust ZoomTerraBlenderServer Performance - Smooth Chunk SaveSophisticated StorageComplementary Shaders - ReimaginedEureka! Ships! for Valkyrien Skies (Forge/Fabric)Mob Spider ClimbModernFixChunk SendingStructure Essentialsfix GPU memory leakForgified Fabric APISinytra ConnectorCarbon ConfigRecipe EssentialsBiome ReplacerGeophilic ReforgedCopper & Tuff Backport (from 1.21) [Fabric | Forge]Underground BunkersOh The Trees You'll GrowMobtimizations - Entity Performance Fixes
    Share graded A or B
    up 6 points

    Details

    Creator
    Zombie108
    License
    All rights reserved
    Downloads
    55
    Created
    26 Jan 2026
    Official page
    CurseForge

    Security

    No harmful code found in the projects we checked

    We checked 200 of its 203 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 · 200 of 203 projects checked
    • Its projects
      See what is in this pack
      203 projects
    • Not checked yet
      CW Gun ExpansionFragmented Totem[SBW] Source Vehicle Pack
      3 projects
    • Files in the pack itself
      Not checked yet.

    Privacy

    5 mods send something about you

    We read the code of 198 of its 201 mods, without running it.

    Entity CullingCrash reportsFancyMenuCrash reportsNot Enough AnimationsCrash reportsLet Me DespawnUsage dataCrash AssistantData we could not identify

    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 · 198 of 201 mods read
    • Go online onlyTheir code contacts a web address, for example to check for updates. We found nothing it sends about you.
      BookshelfCollectivePlaceboMoonlight Lib[ETF] Entity Texture FeaturesFTB Library (NeoForge)CitadelSimple Voice ChatRhinoKubeJSEuphoria PatchesSecurityCraftCorgiLibCraftPresenceAlmanac[TaCZ] Timeless and Classics ZeroTenshiLibAuudio [Forge]GroovyModLoader (GML)Flan (Forge, NeoForge)
      20 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.
      Collectivedeclared by its authorKubeJSdeclared by its author
      2 mods
    • Send nothing
      Their code contacts no web address.
      173 mods
    • Not read yet
      We have not read their code yet.
      3 mods

    AI

    No sign that AI was used to make its mods

    We found no AI use from before this release (29 Jan 2026) in the 172 mods we checked.

    7 mods show AI use only from after it, so it does not apply to the versions in this pack.

    29 mods are not checked yet.

    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 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.
      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 2 files
    Forge
    1.201.2126.126.3

    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.203 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 1.20.1. Many recently updated mods still support 1.20.1.

    2 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1·Forge1.11.1 · The Underground Infection-1.1.zipBeta·29 Jan 2026Partly checkedPartly checked: 200 of 203 projects checked (3 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.
    1.20.1·ForgeThe Underground InfectionThe Underground Infection · The Underground Infection.zip·27 Jan 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.