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    2,075,002 files checkedFiles from Modrinth and CurseForge we downloaded and checked. Counted on 27 Oct 2026.657,986 files with their code readFiles whose code we turned back into readable code and read, in an isolated environment. Counted on 27 Oct 2026.270,344 projects gradedProjects with a letter from A to F. Counted on 27 Oct 2026.

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

    Unstable SMP Simulator

    Modpack

    A modpack that makes installing simulator maps and mods easier.

    Download

    Files come from Modrinth servers.

    unstable-1.21.11.mrpack

    Released 21 Oct 2026 · 372.4 KB

    Not checked: we have not checked this file yet.

    Download
    91%Modpack: 91% of its graded mods are A or Bof mods A or B
    Security
    Passed
    Privacy
    4 send data
    Runs on
    Singleplayer only
    Loaders
    Fabric
    Minecraft versions
    Up to 1.21.11
    • Overview91%
    • SecurityPassed
    • Privacy4 send data
    • AIIn 2 mods
    • CompatibilityUp to 1.21.11
    • ReleasesLatest 21 Oct
    OverviewSecurityPrivacyAICompatibilityReleases

    Mod grades

    How grades work

    Modpacks get no grade of their own, so we show the grades of its mods. Of its 22 graded mods, 20 are graded A or B, 2 C and none D to F. Its last update came out 6 days ago, for Minecraft 1.21.11. See the mods

    Images

    • Unstable SMP

    About

    Unstable SMP Simulator makes it easier to play Minecraft simulator maps by bundling the maps and PvP mods instead of requiring players to select and configure everything manually, with new simulators available through updates or the in-game import option. Its collection includes Unstable SMP battles and tournament maps, prison and breakout scenarios, training and PvP practice maps, manhunts, and other matchups, including Unstable SMP Final Law Battle, Unstable SMP Tournament, Dream Manhunt, ManePear’s training simulator, and Wemmbu vs Null Wraiths. The pack offers Carpet-based and Vexbot-based simulator sets; the Vexbot set provides an import option for its larger map collection, while the Carpet set includes maps such as Cindercrest Battle Simulator, Eggchan vs Wemmbu Simulator, and Null prison full. Included tools and mods support PvP, player-data modification, combat fixes, armor HUD, and performance, with examples including Carpet, Carpet crit fix, uku’s Armor HUD, Sodium, and Lithium.

    Written from Modrinth . How we write it

    Mods in this pack24 of 24 checked

    The mods of its newest release (Minecraft 1.21.11 · Fabric, 19 Oct 2026). Each check result is for the latest files of that mod, which may not be the version in this pack.

    ModGradeSecurity
    Fabric APIMod · 529.6M downloadsAPassedPassed: our checks found nothing harmful in the latest files.AppleSkinMod · 520.1M 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.SodiumMod · 414.7M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Iris ShadersMod · 339.5M downloadsAPassedPassed: our checks found nothing harmful in the latest files.ImmediatelyFastMod · 331.7M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Mod MenuMod · 246M downloadsAPassedPassed: our checks found nothing harmful in the latest files.FerriteCoreMod · 245.3M downloadsAPassedPassed: our checks found nothing harmful in the latest files.LithiumMod · 243.7M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Sodium ExtraMod · 182.4M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Text Placeholder APIMod · 92.6M downloadsAPassedPassed: our checks found nothing harmful in the latest files.MaLiLibMod · 59.6M downloadsAPassedPassed: our checks found nothing harmful in the latest files.LitematicaMod · 43.1M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Immersive OptimizationMod · 19.3M downloadsAPassedPassed: our checks found nothing harmful in the latest files.CarpetMod · 16M downloadsAPassedPassed: our checks found nothing harmful in the latest files.ukulibMod · 15M downloadsAPassedPassed: our checks found nothing harmful in the latest files.uku's Armor HUDMod · 10.3M downloadsAPassedPassed: our checks found nothing harmful in the latest files.BetterHurtCamMod · 4.1M downloadsAPassedPassed: our checks found nothing harmful in the latest files.Modify Player DataMod · 997K downloadsAPassedPassed: our checks found nothing harmful in the latest files.VexBotMod · 293K downloadsCPassedPassed: our checks found nothing harmful in the latest files.Carpet mace fixMod · 138K downloads-PassedPassed: our checks found nothing harmful in the latest files.Wither Death SoundsMod · 122K downloadsCPassedPassed: our checks found nothing harmful in the latest files.Carpet crit fixMod · 112K downloads-PassedPassed: our checks found nothing harmful in the latest files.
    Changes since the previous release · 4 added, 10 removed, 1 updated

    Compared with the release of 10 Oct 2026 for the same platform, Minecraft version and loader.

    Added
    CarpetLitematicaCarpet crit fixCarpet mace fix
    Removed
    Explosion Breaks No BlockCommand KeysWalksyLibShield StatusesShield FixesOrbital Strike CannonvoxyUnstable GenerationInventory MenuHeroBot
    New version
    VexBot
    Share graded A or B
    up 4 points

    Details

    Creator
    Hi_Its_I
    License
    All rights reserved
    Downloads
    151K
    Created
    11 Apr 2026
    Official page
    Modrinth
    Links
    Issues

    Security

    No harmful code found in its mods

    We checked all 24 mods and the files in the pack itself, without running them.

    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 · All 24 mods checked
    • Its projects
      See what is in this pack
      24 mods
    • Files in the pack itself
      17,733 settings files, 15 resource, shader or data packs, 3 programs, 10,932 other files.
    • Other files

      2 mod files are inside the pack file itself: none matches a known file (fake-player-mod-1.0.0.jar and totem-of-null-1.0.0+1.21.11(4).jar).

    • 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.

    Privacy

    4 mods send something about you

    We read the code of all 24 of its mods, without running it.

    Entity CullingCrash reportsMod MenuData we could not identifyukulibCrash reportsVexBotData 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 · All 24 mods read
    • Go online onlyTheir code contacts a web address, for example to check for updates. We found nothing it sends about you.
      Iris ShadersCarpet
      2 mods
    • Send nothing
      Their code contacts no web address.
      18 mods

    AI

    AI named in 2 of the 24 mods we checked

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

    Iris ShadersdeclaredVexBotdeclared

    No sign so far that AI was used to make the pack itself

    We looked for AI tools in its texts and found none.

    We have not read its files and images 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 · 2 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 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
      20 changelogs read
    • Its filesCredits and texts in the files you download that name an AI tool.
      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 34 files
    Fabric
    1.2126.126.2

    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.It works in singleplayer and does not work in multiplayer.
    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.24 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 1.21.11. Many recently updated mods still support 1.21.11.

    34 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.21.11·Fabric6.06.0 · unstable-1.21.11.mrpack (main file)·21 Oct 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 372.4 KB
    1.21·Fabric5.05.0 · unstable.mrpack (main file)·21 Oct 2026PassedPassed: all 24 mods checked.Open this file on ModrinthDownload · Stable · 1.7 MB
    1.21.11·Fabric5.05.0 · unstable-1.21.11.mrpack (main file)·19 Oct 2026PassedPassed: all 24 mods checked.Open this file on ModrinthDownload · Stable · 301.7 MB
    1.21.11·Fabric7.4.17.4.1 · vex-1.21.11.mrpack (main file)·10 Oct 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 261.2 MB
    1.21.11·Fabric7.47.4 · vex-1.21.11.mrpack (main file)·10 Oct 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 261.2 MB
    1.21·Fabric4.14.1 · unstable.mrpack (main file)·10 Oct 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 459.9 MB
    1.21·Fabric4.04.0 · unstable.mrpack (main file)·30 Sep 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 398.4 MB
    1.21.11·Fabric7.37.3 · unstable1.21.11.mrpack (main file)·10 Sep 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 264.1 MB
    1.21.11·Fabric7.27.2 · unstable1.21.11.mrpack (main file)·9 Sep 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 263.7 MB
    1.21.11·Fabric7.17.1 · unstable1.21.11.mrpack (main file)·8 Sep 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 261.0 MB
    1.21.11·Fabric7.07.0 · unstable1.21.11.mrpack (main file)·7 Sep 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 261.0 MB
    1.21.11·Fabric4.04.0 · unstable1.21.11.mrpack (main file)·10 Aug 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 470.5 MB
    1.21.11·Fabric6.26.2 · UUSIM v2.mrpack (main file)·26 Jul 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 483.7 MB
    1.21.11·Fabric6.16.1 · UUSIM v2.mrpack (main file)·23 Jul 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 473.1 MB
    1.21.11·Fabric6.06.0 · UUSIM v2.mrpack (main file)·23 Jul 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 464.7 MB
    1.21.11·Fabric5.05.0 · UUSIM v2.mrpack (main file)·23 Jul 2026PassedPassed: all 24 mods checked.Open this file on ModrinthDownload · Stable · 499.3 MB
    1.21.11·Fabric4.04.0 · UUSIM v2.mrpack (main file)·22 Jul 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 451.6 MB
    1.21.11·Fabric3.03.0 · UUSIM v2.mrpack (main file)·19 Jul 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 293.1 MB
    1.21.11·Fabric2.02.0 · UUSIM v2.mrpack (main file)·18 Jul 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 286.6 MB
    1.21.11·Fabric1.11.1 · UUSIM v2.mrpack (main file)·15 Jul 2026Not checkedWe have not checked this file yet.Open this file on ModrinthDownload · Stable · 223.0 MB
    1 to 20 of 3412