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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.

    OutpostZero

    Mod

    Begin underground in a survival bunker and find others across the world.

    B84/ 100
    • OverviewB
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 26.3
    • ModpacksIn 42
    • ReleasesLatest 17 Oct

    Download

    outpostzero-neoforge-26.3-1.0.21.jar

    Released 17 Oct 2026 · 4.9 MB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade B

    How grades work

    Strengths

    • Security checks passed
    • Regular releases for the newest Minecraft versions
    • Widely used

    Points lost

    • No source code link−7 points
    • First release only 8 months ago−3 points
    • Some modpacks removed it−1 point
    All 11 criteria

    • Maintenance

      Full points27 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.7 days ago (17 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.26.3 (latest) on NeoForge, 1.20.1 on Forge 9 / 9
      Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 8 of the last 24 months 6 / 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.4 of the 32 modpacks with two or more versions removed it in a later one (13%) See the 4 modpacks9 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.2 of its 31 releases in 2 years needed a quick fix (6%) 7 / 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

      7 points lost3 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.No link on the project page 0 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · pcolb1/OutpostZero 3 / 3

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.217,907 4 / 4

    • Track record

      3 points lost5 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.8 months, 88 releases 5 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 10 latest files for recent Minecraft versions. See Security
    Total84 / 100

    59.5 of the 71 points that apply = 84 out of 100. The points above are rounded to whole numbers.

    Images

    • Your world begins inside an underground bunker
    • Data Log interface showing recovered facility records
    • The only way out leads back to the surface
    • Hidden bunker entrances can be discovered across the world
    • Not every bunker was abandoned safely…
    • A reliable light source for navigating the unknown

    About

    OutpostZero is a survival-focused mod that begins your world in a generated underground bunker and adds further hidden facilities to find across the world. Bunkers use configurable generation and varied modular room layouts, with discoverable data logs and environmental details that hint at the facilities’ histories, including optional references to Patient Four. Their infrastructure includes airlock doors, motion sensors, lighting, industrial equipment, and storage such as crates, lockers, industrial drums, and portable cardboard boxes. For survival beyond the bunkers, the mod adds craftable flashlights, rechargeable batteries, industrial tools, a steel generator, and gas masks, along with medical items such as vaccines, poultices, and tinctures. Flashlights provide server-side light and can use rechargeable Forge Energy batteries; optional dynamic lighting can add visibility effects, and a steel generator supplies Forge Energy. An optional configurable infection system can integrate with The Hordes or run on its own, progressing through three stages of worsening combat and movement penalties and ultimately death if untreated. Vaccines, resistance tinctures, and gas masks provide ways to address or reduce infection risk, while the system can be enabled or disabled independently. Datapack-friendly structure and loot design, configurable generation, and multiplayer-safe world generation make the mod adaptable to standalone play and survival or zombie-themed modpacks.

    Written from Modrinth and CurseForge . How we write it

    In-game changes

    Changes the game's code in 3 areas: World generationChanges 1 game code file in this area: terrain, biomes and structures made when new land is created., PlayerChanges 1 game code file in this area: your character: movement, abilities, hunger and controls. and Inventory and itemsChanges 1 game code file in this area: items, chests and other containers, crafting and enchanting..

    Adds 53 blocks, 31 items, 1 mob, 1 other entity, 1 structure, 2 enchantments, 78 recipes, 7 advancements, 13 loot tables, 20 sounds and 2 key bindings.

    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.

    Often used with it

    See all 30
    Underground BunkersCThe Lost CitiesAMrCrayfish's Furniture Mod: RefurbishedACreate DecoB[TaCZ] Timeless and Classics ZeroA

    Details

    Creator
    M0stlyHarmless
    License
    All rights reserved
    Downloads
    218K
    Created
    7 Mar 2026
    Official pages
    Modrinth , CurseForge

    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. 3 files 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 10 latest files checked, last on 17 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.
      10 latest files: the newest file for each Minecraft version and loader. All 10 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.
    • Modrinth and CurseForgeA release with a different file on Modrinth and on CurseForge, whose code is not the same. Each file is checked on its own. Nothing is blocked.
      Minecraft 1.20.1 · Forge · release 1.0.4 · 5 Apr 2026: Modrinth outpostzero-forge-1.20.1-1.0.4.jar, CurseForge outpostzero-forge-1.20.1-1.0.4.jar. 1 class changed, 1 class only in the CurseForge file, 1 class only in the Modrinth file, in dev.mostlyharmless.outpostzero: FlashlightItem, FlashlightItemClient (CurseForge only), FlashlightItemClient (Modrinth only).
      code differs in 1 release

    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 10 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 10 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, images and sounds 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 · 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.
    • 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
      30 of 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
      168 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
      14 sounds 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
      276 code files read

    Compatibility

    See all 88 files
    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.
    LambDynamicLights - Dynamic LightsAOutpost Zero: CampsitesDThe HordesBSodium Dynamic LightsC
    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.About as fast as most mods. On average, it gets a file 27 days after a new Minecraft version comes out. Measured on the last 3 Minecraft versions.

    Modpacks using this project

    Find modpacks with it

    42 modpacks include OutpostZero in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    ZOMBIEMANIA - A Modern Zombie Apocalypse1M downloadslast version with it 13 Oct 2026Protocol Zero - A Modern Zombie Apocalypse 101K downloadslast version with it 16 Oct 2026Lees Zombie Apocalypse - Fallen Earth63K downloadslast version with it 3 Sep 2026Zombie Horizon - Realistic Zombie World58K downloadslast version with it 8 Oct 2026Remnants of Earth - A Modern Zombie Apocalypse [TACZ] [Custom Generation] [Ready to go]9.8K downloadslast version with it 4 Sep 2026Better Survival (BSurvival) (No. 2 is Out)8.6K downloadslast version with it 15 Sep 2026ATB [After The Bombs] Zombies5.6K downloadslast version with it 22 Oct 2026SKD - Exploration4K downloadslast version with it 29 Sep 2026Goldens Changed2.6K downloadslast version with it 19 Aug 2026TurtleCraftSMP2K downloadslast version with it 19 Apr 2026
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with OutpostZero. Share: how many of the modpacks with OutpostZero also have that mod.

    ProjectTypeShareGrade
    Underground BunkersCModin 74% of the modpacks with OutpostZeroThe Lost CitiesAModin 74% of the modpacks with OutpostZeroMrCrayfish's Furniture Mod: RefurbishedAModin 74% of the modpacks with OutpostZeroCreate DecoBModin 74% of the modpacks with OutpostZero[TaCZ] Timeless and Classics ZeroAModin 71% of the modpacks with OutpostZeroBadOptimizationsAModin 71% of the modpacks with OutpostZeroZombie AwarenessCModin 69% of the modpacks with OutpostZeroImmersive Weathering [FORGE]CModin 67% of the modpacks with OutpostZeroDoomsday DecorationCModin 64% of the modpacks with OutpostZeroHorror Element ModBModin 64% of the modpacks with OutpostZero
    1 to 10 of 30123

    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
    26.3·NeoForge1.0.211.0.21 · outpostzero-neoforge-26.3-1.0.21.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.2·NeoForge1.0.211.0.21 · outpostzero-neoforge-26.2-1.0.21.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1.2·NeoForge1.0.211.0.21 · outpostzero-neoforge-26.1.2-1.0.21.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    26.1.2·NeoForge1.0.101.0.10 · outpostzero-neoforge-26.1.2-1.0.10.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.11·NeoForge1.0.211.0.21 · outpostzero-neoforge-1.21.11-1.0.21.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.11·NeoForge1.0.101.0.10 · outpostzero-neoforge-1.21.11-1.0.10.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1·NeoForge1.0.211.0.21 · outpostzero-neoforge-1.21.1-1.0.21.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1·NeoForge1.0.101.0.10 · outpostzero-neoforge-1.21.1-1.0.10.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.0.211.0.21 · outpostzero-forge-1.20.1-1.0.21.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.0.101.0.10 · outpostzero-forge-1.20.1-1.0.10.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.

    88 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    26.3The latest file for its Minecraft version and loader·NeoForge1.0.211.0.21 · outpostzero-neoforge-26.3-1.0.21.jar·17 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    26.2The latest file for its Minecraft version and loader·NeoForge1.0.211.0.21 · outpostzero-neoforge-26.2-1.0.21.jar·17 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    26.1.2The latest file for its Minecraft version and loader·NeoForge1.0.211.0.21 · outpostzero-neoforge-26.1.2-1.0.21.jar·17 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    1.21.11The latest file for its Minecraft version and loader·NeoForge1.0.211.0.21 · outpostzero-neoforge-1.21.11-1.0.21.jar·17 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.0.211.0.21 · outpostzero-neoforge-1.21.1-1.0.21.jar·17 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    1.20.1The latest file for its Minecraft version and loader·Forge1.0.211.0.21 · outpostzero-forge-1.20.1-1.0.21.jar·17 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    26.3·NeoForge1.0.201.0.20 · outpostzero-neoforge-26.3-1.0.20.jar·9 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    26.2·NeoForge1.0.201.0.20 · outpostzero-neoforge-26.2-1.0.20.jar·9 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    26.1.2·NeoForge1.0.201.0.20 · outpostzero-neoforge-26.1.2-1.0.20.jar·9 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    1.21.11·NeoForge1.0.201.0.20 · outpostzero-neoforge-1.21.11-1.0.20.jar·9 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.9 MB
    1.21.1·NeoForge1.0.201.0.20 · outpostzero-neoforge-1.21.1-1.0.20.jar·9 Oct 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.8 MB
    1.20.1·Forge1.0.201.0.20 · outpostzero-forge-1.20.1-1.0.20.jar·9 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.8 MB
    26.3·NeoForge1.0.191.0.19 · outpostzero-neoforge-26.3-1.0.19.jar·3 Oct 2026PassedOur checks found nothing harmful in this file. Its code was read too.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.8 MB
    26.2·NeoForge1.0.191.0.19 · outpostzero-neoforge-26.2-1.0.19.jar·3 Oct 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.8 MB
    26.1.2·NeoForge1.0.191.0.19 · outpostzero-neoforge-26.1.2-1.0.19.jar·3 Oct 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.8 MB
    1.21.11·NeoForge1.0.191.0.19 · outpostzero-neoforge-1.21.11-1.0.19.jar·3 Oct 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.8 MB
    1.21.1·NeoForge1.0.191.0.19 · outpostzero-neoforge-1.21.1-1.0.19.jar·3 Oct 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.7 MB
    1.20.1·Forge1.0.191.0.19 · outpostzero-forge-1.20.1-1.0.19.jar·3 Oct 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.7 MB
    26.3·NeoForge1.0.181.0.18 · outpostzero-neoforge-26.3-1.0.18.jar·23 Sep 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.7 MB
    26.2·NeoForge1.0.181.0.18 · outpostzero-neoforge-26.2-1.0.18.jar·23 Sep 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 4.7 MB
    1 to 20 of 8812345

    Quick fixes

    In the last 2 years, 2 releases needed a quick fix: a new release within 3 days to fix a problem. This counts in the grade, but it is too few to lose points.

    See them, newest first

    Quick fixesReleases followed within 3 days by a new release that fixes a problem in them.2

    • outpostzero-forge-1.20.1-1.0.4.jar and 1 other release5 Apr 2026…block placement into lit spaces Fixed Fixed dedicated server startup crash caused…