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    2,055,424 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 2026.269,392 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.

    CS - Complementary Structures

    Mod

    Small and big structures that are added to your world.

    B86/ 100
    • OverviewB
    • SecurityPassed
    • PrivacyNone found
    • AINone found
    • CompatibilityUp to 26.2
    • ModpacksIn 33
    • ReleasesLatest 29 Mar

    Download

    cs-1.5.1-neoforge_26.1.jar

    Released 29 Mar 2026 · 880.2 KB

    Passed: our checks found nothing harmful in this file.

    Download
    OverviewSecurityPrivacyAICompatibilityModpacksReleases

    Why grade B

    How grades work

    Strengths

    • Security checks passed

    Points lost

    • No release or new Minecraft version in 4 months−3 points
    • Some modpacks removed it−3 points
    • No public issue tracker−3 points
    • Under 5 million downloads−1 point
    All 11 criteria

    • Maintenance

      2 points lost25 / 27
      Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.The author marked an existing file as working on Minecraft 26.2, which came out on 16 Jun 2026 10 / 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.26.2 on NeoForge, 1.20.1 on Forge and Fabric. 55% of the 995 popular NeoForge mods updated in the last 6 months also have files for 26.2. 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 12 of the last 24 months 6 / 6

    • Stability

      3 points lost19 / 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.5 of the 27 modpacks with two or more versions removed it in a later one (19%) See the 5 modpacks7 / 10
      Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.No quick fix in 2 years 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

      3 points lost7 / 10
      Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · ElAguilaMC623/Complementary-Structures 7 / 7
      Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.No link to report problems 0 / 3

    • Popularity

      1 point lost3 / 4
      DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.39,357 3 / 4

    • Track record

      1 point lost7 / 8
      AgeHow long the project has existed. It counts less when no new file came out recently.18 months, 103 releases 7 / 8

    • Security

      Passed
      File checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 7 latest files for recent Minecraft versions. See Security
    Total86 / 100

    61.1 of the 71 points that apply = 86 out of 100. The points above are rounded to whole numbers.

    Images

    • Illager Castle
    • Illager Camp
    • Husk Dungeon
    • Great Desert Pyramid (The image is slightly saturated because it has to weigh less than 2 megabytes)
    • Vindicator´s House (The image is slightly saturated because it has to weigh less than 2 megabytes)
    • Librarian´s Tower
    • Librarían Tower´s (Inside)
    • Stray´s Dungeon
    • Great Desert Pyramid (A room inside)

    About

    CS Complementary Structures adds 63 small and large structures to Minecraft worlds, extending exploration with places to discover across the Overworld, Nether, and End. Its structures range from practical shelters and camps, such as the Vindicator’s House in taiga biomes, the Mangrove House, and the Wandering Trader Camp, to hostile sites including Illager Castles, Illager Camps, and an Illager Palace populated by several kinds of illagers. Dungeons and exploration challenges include a desert pyramid with a maze and husk spawners, a jungle pyramid guarded by cave spider spawners, and underground witch and stray spawner sites that can also serve as farm locations. The End has its own mix of structures, including shulker-filled towers with End City loot, small houses, floating gardens, and tree altars with spruce, jungle, mangrove, cherry, or crimson variants. Some structures also introduce unique rewards: the Prismarine Tower contains Prismarine Ingots used for tools that grant Water Breathing while held, while the Illager Palace’s King Blade sets targets on fire and inflicts Wither and Slowness.

    Written from Modrinth and CurseForge . How we write it

    In-game changes

    Changes the game's code in 1 area: Inventory and itemsChanges 1 game code file in this area: items, chests and other containers, crafting and enchanting..

    Adds 8 items, 61 structures and 5 recipes.

    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
    Towns and TowersBSophisticated StorageAsparkAExplorifyCIron's Spells 'n SpellbooksA

    Details

    Creator
    ElAguilaMC623
    License
    MIT License
    Downloads
    39K
    Created
    27 Apr 2025
    Official pages
    Modrinth , CurseForge
    Links
    Source code

    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. Only in its files for NeoForge 1.21.1 to 1.21.10; Forge 1.20.1.

    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 11 latest files checked, last on 16 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.
      11 latest files: the newest file for each Minecraft version and loader. The answer above is about the 7 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 · All 7 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 7 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 and images 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 · 5 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
      8 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
      8 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
      13 code files read

    Compatibility

    See all 103 files
    Fabric
    NeoForge
    Forge
    1.181.201.2126.1

    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.
    Fabric APIon FabricACC - Complementary Coreon ForgeB
    OptionalProjects it can work with but does not need. The author lists them.Nothing
    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 34 days after a new Minecraft version comes out. Measured on the last 5 Minecraft versions. No file yet for Minecraft 26.3.

    Modpacks using this project

    Find modpacks with it
    Modpacks that released a new version with this project, each month
    840
    Oct 2024: 0 modpacksNov 2024: 0 modpacksDec 2024: 0 modpacksJan 2025: 0 modpacksFeb 2025: 0 modpacksMar 2025: 0 modpacksApr 2025: 0 modpacksMay 2025: 1 modpackJun 2025: 2 modpacksJul 2025: 3 modpacksAug 2025: 6 modpacksSep 2025: 5 modpacksOct 2025: 7 modpacksNov 2025: 6 modpacksDec 2025: 5 modpacksJan 2026: 6 modpacksFeb 2026: 5 modpacksMar 2026: 4 modpacksApr 2026: 4 modpacksMay 2026: 2 modpacksJun 2026: 4 modpacksJul 2026: 5 modpacksAug 2026: 5 modpacksSep 2026: 6 modpacks
    Oct 2024Oct 2025Sep 2026
    Modpacks that released a new version with this project, each month
    Oct 20240
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    Sep 20266

    More modpacks put it in their new versions than a year ago: 4 a month now, 3 a year agoThe average of the last 6 months, compared with the same 6 months a year before. We say it only when the change is large..

    33 modpacks include CS - Complementary Structures in at least one of their versions. Here are the 30 most downloaded.

    ModpackDownloadsLast version with it
    NeoTech Reborn113K downloadslast version with it 13 Jul 2026The Broken Script: Moonfall5.1K downloadslast version with it 8 May 2026New World - Legends 2.3K downloadslast version with it 29 Jan 2026PROJECT RPG - Origins2.1K downloadslast version with it 2 Aug 2025Villager Kingdoms - Build, Recruit & Conquer756 downloadslast version with it 26 Sep 2026Lowkey Adventure+ Modpack649 downloadslast version with it 25 Sep 2026CW2 - Complementary Worlds 2577 downloadslast version with it 6 Apr 2026Horror with RPG524 downloadslast version with it 1 Jan 2026The tech with no borders502 downloadslast version with it 9 Sep 2025CW1 - Complementary Worlds 1474 downloadslast version with it 14 Mar 2026
    1 to 10 of 30123

    Often in the same modpacks

    Mods that modpacks often add together with CS - Complementary Structures. Share: how many of the modpacks with CS - Complementary Structures also have that mod.

    ProjectTypeShareGrade
    Towns and TowersBModin 67% of the modpacks with CS - Complementary StructuresSophisticated StorageAModin 58% of the modpacks with CS - Complementary StructuressparkAModin 55% of the modpacks with CS - Complementary StructuresExplorifyCModin 52% of the modpacks with CS - Complementary StructuresIron's Spells 'n SpellbooksAModin 52% of the modpacks with CS - Complementary StructuresDeeper and DarkerAModin 52% of the modpacks with CS - Complementary StructuresL_Ender's CataclysmBModin 52% of the modpacks with CS - Complementary StructuresExplorer's CompassAModin 48% of the modpacks with CS - Complementary StructuresServer Performance - Smooth Chunk SaveAModin 48% of the modpacks with CS - Complementary StructuresAmendmentsAModin 48% of the modpacks with CS - Complementary Structures
    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
    26.1 to 26.2·NeoForge1.5.11.5.1 · cs-1.5.1-neoforge_26.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.11·NeoForge1.5.11.5.1 · cs_1.5.1-neoforge_1.21.11.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.5 to 1.21.10·NeoForge1.5.11.5.1 · cs-1.5.1-neoforge_1.21.5-1.21.10.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.3 to 1.21.4·NeoForge1.5.11.5.1 · cs-1.5.1-neoforge_1.21.3-4.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.21.1·NeoForge1.5.11.5.1 · cs-1.5.1-neoforge_1.21.1.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Fabric1.4.11.4.1 · complementary_structures-1.4.1-fabric-1.20.1.jarSends: None foundRequires:Fabric APIPassedOur checks found nothing harmful in this file. Its code was read too.
    1.20.1·Forge1.5.11.5.1 · cs-1.5.1-forge_1.20.1.jarSends: None foundRequires:CC - Complementary CoreCC - Complementary CorePassedOur checks found nothing harmful in this file. Its code was read too.
    Older Minecraft versions
    1.20·Forge1.6.01.6.0 · cs-pre5_1.6.0-forge_1.20.jarSends: None foundRequires:CC - Complementary CoreCC - Complementary CorePassedOur checks found nothing harmful in this file. Its code was read too.
    1.19.3 to 1.19.4·Forge1.5.11.5.1 · cs-1.5.1-forge_1.19.3-1.19.4.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1.19 to 1.19.2·Forge1.5.11.5.1 · cs-1.5.1-forge_1.19.jarSends: None foundRequires:NothingPassedOur checks found nothing harmful in this file. Its code was read too.
    1 to 10 of 1112

    103 releases

    MinecraftLoaderVersionReleasedSecurityGet it onDownload
    26.1 to 26.226.1 to 26.2The latest file for its Minecraft version and loader·NeoForge1.5.11.5.1 · cs-1.5.1-neoforge_26.1.jar (main file)·29 Mar 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 880.2 KB
    1.20 to 1.20.11.20 to 1.20.1The latest file for its Minecraft version and loader·Forge1.6.01.6.0 · cs-pre5_1.6.0-forge_1.20.jar (main file)Beta·28 Feb 2026PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 930.2 KB
    1.20 to 1.20.11.20 to 1.20.1·Forge4-1.6.04-1.6.0 · cs-pre4_1.6.0-forge_1.20.jarBeta·24 Jan 2026PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 930.9 KB
    1.21.11The latest file for its Minecraft version and loader·NeoForge1.5.11.5.1 · cs_1.5.1-neoforge_1.21.11.jar (main file)·12 Dec 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 880.2 KB
    1.20 to 1.20.11.20 to 1.20.1·Forge3-1.6.03-1.6.0 · cs-pre3_1.6.0-forge_1.20.jarBeta·22 Nov 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 924.1 KB
    1.20 to 1.20.11.20 to 1.20.1·Forge1.6.01.6.0 · cs-pre2_1.6.0-forge_1.20.jar (main file)Beta·11 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 914.6 KB
    1.20 to 1.20.11.20 to 1.20.1·Forge1.6.01.6.0 · cs-pre1_1.6.0-forge_1.20.jar (main file)Beta·2 Nov 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Beta · 908.6 KB
    1.21.5 to 1.21.101.21.5 to 1.21.10The latest file for its Minecraft version and loader·NeoForge1.5.11.5.1 · cs-1.5.1-neoforge_1.21.5-1.21.10.jar (main file)·28 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 882.2 KB
    1.21.3 to 1.21.41.21.3 to 1.21.4The latest file for its Minecraft version and loader·NeoForge1.5.11.5.1 · cs-1.5.1-neoforge_1.21.3-4.jar (main file)·26 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 882.2 KB
    1.21.1The latest file for its Minecraft version and loader·NeoForge1.5.11.5.1 · cs-1.5.1-neoforge_1.21.1.jar (main file)·11 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 888.3 KB
    1.19.3 to 1.19.41.19.3 to 1.19.4The latest file for its Minecraft version and loader·Forge1.5.11.5.1 · cs-1.5.1-forge_1.19.3-1.19.4.jar (main file)·4 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 898.7 KB
    1.19 to 1.19.21.19 to 1.19.2The latest file for its Minecraft version and loader·Forge1.5.11.5.1 · cs-1.5.1-forge_1.19.jar (main file)·4 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 898.8 KB
    1.20.1The latest file for its Minecraft version and loader·Forge1.5.11.5.1 · cs-1.5.1-forge_1.20.1.jar (main file)·4 Oct 2025PassedOur checks found nothing harmful in this file. Its code was read too.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 898.7 KB
    1.20.1·Forge1.5.01.5.0 · cs-1.5.0-forge_1.20.1.jar·20 Sep 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 889.9 KB
    1.19.3 to 1.19.41.19.3 to 1.19.4·Forge1.5.01.5.0 · cs-1.5.0-forge_1.19.3-1.19.4.jar·20 Sep 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 889.9 KB
    1.19 to 1.19.21.19 to 1.19.2·Forge1.5.01.5.0 · cs-1.5.0-forge_1.19.jar·20 Sep 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Stable · 889.9 KB
    1.19 to 1.19.21.19 to 1.19.2·Forge2-1.5.02-1.5.0 · complementary_structures-pre2-1.5.0-1.19.jarBeta·16 Sep 2025PassedOur checks found nothing harmful in this file.Not on ModrinthOpen this file on CurseForgeDownload · Beta · 889.9 KB
    1.21.5·NeoForge1.4.51.4.5 · complementary_structures-1.4.5-neoforge-1.21.5.jar (main file)·13 Sep 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 839.1 KB
    1.21.1·NeoForge1.4.51.4.5 · complementary_structures-1.4.5-neoforge-1.21.1.jar (main file)·13 Sep 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 847.1 KB
    1.20.1·Forge1.4.51.4.5 · complementary_structures-1.4.5-forge-1.20.1.jar (main file)·13 Sep 2025PassedOur checks found nothing harmful in this file.Open this file on ModrinthOpen this file on CurseForgeDownload · Stable · 869.2 KB
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