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    2,046,932 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 2026.269,480 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.

    Lost Worlds LC

    Mod

    Adds five new world types to choose from at world creation.

    C72/ 100
    • OverviewC
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityMinecraft 1.20.1
    • ModpacksIn 45
    • ReleasesLatest Feb 2025

    Download

    lostworlds-1.20-0.0.1.jar

    Released 19 Jan 2024 · 523.8 KB

    Passed: our checks found nothing harmful in this file.

    A newer beta from 9 Feb 2025 is in Releases.

    Download

    Required to run

    • The Lost CitiesAMinecraft 1.20.1 · Forge (release 1.20-7.5.7)
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade C

    How grades work

    Strengths

    • Public source code and issue tracker
    • Widely used

    Points lost

    • No release in 20 months−12 points
    • Releases in only 1 of the last 24 months−5 points
    • Some modpacks removed it−1 point
    All 11 criteria

    • Maintenance

      12 points lost15 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.20 months ago (9 Feb 2025). 22 modpacks released in the last 6 months still include it, so it keeps 40% of these points. 5 / 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.1.20.1 on Forge. 15% or more of the popular mods updated in the last 6 months also have files for 1.20.1. 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 1 of the last 24 months 1 / 6

    • Stability

      1 point lost14 / 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.4 of the 34 modpacks with two or more versions removed it in a later one (12%) 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.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 · McJtyMods/LostWorlds 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · McJtyMods/LostWorlds 3 / 3

    • Popularity

      Full points4 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.2,810,926 4 / 4

    • Track record

      5 points lost3 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.2.8 years, 3 releases 3 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in both latest files for recent Minecraft versions. See Security
    Total72 / 100

    46.1 of the 64 points that apply = 72 out of 100. The points above are rounded to whole numbers.

    Images

    • Spheres containing cities floating above water
    • Cities floating on islands

    About

    Lost Worlds is a companion world-generation mod for Lost Cities that adds a preset with five world types to choose from when creating a world. Islands creates a void world with floating islands for Lost Cities’ floating profile, while Spheres creates a void world where the space profile can generate spheres that may contain cities. Caves creates a challenging Nether-like world with regular stone and ores, intended to pair with Lost Cities’ cavern profile. Normal creates a standard-style world for the biosphere profile and is best paired with the Wastes preset; Atlantis also has a standard-style world, paired with the atlantis profile, with the sea at height 90.

    Written from Modrinth and the GitHub README . How we write it

    In-game changes

    Does not change the game's code directly.

    Adds 1 dimension: Abyss.

    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
    The Lost CitiesASerene SeasonsASecurityCraftAAI Improvements: Performance TuningAAttributeFixA

    Details

    Creator
    McJty
    License
    MIT License
    Downloads
    2.8M
    Created
    19 Jan 2024
    Official pages
    Modrinth , CurseForge
    Links
    Source code , Issues , Wiki , Discord

    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. 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 · Both latest files checked, last on 15 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.
      2 latest files: the newest file for each Minecraft version and loader. Both 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.

    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 · Both 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 both 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 that AI was used to make it

    We looked for AI tools in its texts, files, images and code history and found none.

    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.
      Nothing found
    • 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
      2 of 6 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
      5 images 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
      27 code files read

    Compatibility

    See all 3 files
    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.
    The Lost CitiesA
    OptionalProjects it can work with but does not need. The author lists them.
    The One ProbeA
    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 1.20.1. Many recently updated mods still support 1.20.1.

    Modpacks using this project

    Find modpacks with it

    45 modpacks include Lost Worlds LC in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    DeceasedCraft - Urban Zombie Apocalypse9.8M downloadslast version with it 17 Jul 2026Project - Arcane Frontier155K downloadslast version with it 18 Jun 2026NEEPMeat Official Modpack35K downloadslast version with it 5 Feb 2026GregTech New Frontier13K downloadslast version with it 18 Sep 2026Apocalyptic6K downloadslast version with it 1 Sep 2024Photographic Investigators4.4K downloadslast version with it 29 Apr 2025Last One Alive4K downloadslast version with it 28 Jun 2026Community Made2K downloadslast version with it 27 Aug 2024DeadZone Brasil - DeceasedCraft1.5K downloadslast version with it 20 Oct 2026Norilsk1.5K downloadslast version with it 9 Mar 2024
    1 to 10 of 30123

    Often in the same modpacks

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

    ProjectTypeShareGrade
    The Lost CitiesAModin 98% of the modpacks with Lost Worlds LCSerene SeasonsAModin 64% of the modpacks with Lost Worlds LCSecurityCraftAModin 62% of the modpacks with Lost Worlds LCAI Improvements: Performance TuningAModin 62% of the modpacks with Lost Worlds LCAttributeFixAModin 62% of the modpacks with Lost Worlds LC[TaCZ] Timeless and Classics ZeroAModin 60% of the modpacks with Lost Worlds LCFastSuiteAModin 58% of the modpacks with Lost Worlds LCPacket FixerAModin 58% of the modpacks with Lost Worlds LCFastFurnaceBModin 58% of the modpacks with Lost Worlds LCStarter KitAModin 56% of the modpacks with Lost Worlds LC
    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
    1.20.1·Forge1.20-0.0.31.20-0.0.3 · lostworlds-1.20-0.0.3.jarSends: None foundRequires:The Lost CitiesPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.20-0.0.11.20-0.0.1 · lostworlds-1.20-0.0.1.jarSends: None foundRequires:The Lost CitiesPassedOur checks found nothing harmful in this file. Its code was read too.

    3 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    1.20.1The latest file for its Minecraft version and loader·Forge1.20-0.0.31.20-0.0.3 · lostworlds-1.20-0.0.3.jar (main file)Beta·9 Feb 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 631.8 KB
    1.20.1·Forge1.20-0.0.21.20-0.0.2 · lostworlds-1.20-0.0.2.jar (first file)Beta·7 Aug 2024PassedOur checks found nothing harmful in this file. Same code on Modrinth and CurseForge.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 523.8 KB
    1.20.1The latest file for its Minecraft version and loader·Forge1.20-0.0.11.20-0.0.1 · lostworlds-1.20-0.0.1.jar (first file)·19 Jan 2024PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 523.8 KB