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ArachnidsMinecraft mod for 1.21.1

Arachnids is a mod based on the first Starship Troopers movie and 2005 game about an alien race of bugs.

client and servernewest supported release 1.21.1Mobs
Latest version
0.4.0
Minecraft
1.19.1 to 1.21.1
Java
Java 21+
Loaders
Fabric, NeoForge, Quilt, Forge
Licence
MIT
Downloads
43.7k
Updated
16 d ago
Available on
Modrinth
Space NodeOur hosting

Host Arachnids servers

One click and Arachnids is installed with the right loader, on hardware built for it.

  • 1.21.1
  • Fabric
  • NeoForge
  • Quilt
  • Forge
  • One click mod install
  • Loader matched for you
  • Ryzen CPUs
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Screenshots

Click a screenshot to open it. Screenshots are served from the author’s own host and belong to them.

Minecraft versions

Every version Arachnids declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, NeoForge, Quilt, Forge21+declared8 Aug 2024
1.20.1NeoForge, Quilt, Forge, Fabric17+declared12 Jun 2023
1.20Forge, Quilt, Fabric, NeoForge17+declared2 Jun 2023
1.19.4NeoForge, Fabric, Forge, Quilt17+declared14 Mar 2023
1.19.3Fabric, Quilt, NeoForge, Forge17+declared7 Dec 2022
1.19.2Forge, Quilt, NeoForge, Fabric17+declared5 Aug 2022
1.19.1Forge, Quilt, NeoForge, Fabric17+declared27 Jul 2022

Download

From Arachnids’s own host. Nothing is re-hosted here.

Browse 32 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • Fabric

    0.4.0 · 25 Oct 2026 · arachnids-fabric-1.21.1-0.4.0.jar

    Get Fabric

  • Fabric, NeoForge

    0.3.0 · 8 May 2026

    Multiple loaders are listed; verify the file before downloading.

    Choose file on publisher ↗

Most recently published release

0.4.0release25 Oct 2026

arachnids-fabric-1.21.1-0.4.0.jar · 1.1 MB · for 1.21.1 · Fabric

Download this release
b547dcef3d0f…
Older versions24

Dependencies

What Arachnidsdeclares it needs, from the author’s own release metadata. A required one has to be installed alongside it or it will not load.

Fabric APIRequired. Lightweight and modular API providing common hooks and intercompatibility measures utilized by mods using the Fabric toolchain.AzureLibRequired. Java Minecraft mod using Bedrock models to create custom models and animations for items, blocks, entities

Frequently asked

Does Arachnids work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Arachnids declares support for, and the claim comes from the author's own release metadata rather than from a compatibility list somebody maintains by hand.

Which Minecraft versions does Arachnids support?

Everything the author has declared, from 1.19.1 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Arachnids on the client or the server?

Both. Every player needs it installed and so does the server, so anyone joining without it will be refused.

Which platform or loader does Arachnids support?

Fabric, NeoForge, Quilt, Forge. A build for one platform or loader will not necessarily load on another, so this is the first thing to check before the Minecraft version.

Which Java version do I need for Arachnids?

Among the supported Minecraft releases above, the highest recorded requirement is Java 21 or newer. Use the requirement for the exact Minecraft version you run; previews and snapshots may differ.

What does Arachnids need to run?

It declares Fabric API and AzureLib as required, so those have to be installed alongside it or it will not load. Each one is linked in the dependencies section above.

What licence is Arachnids under?

MIT, as stated by the author on the platform we synced it from. Check the project's own page before redistributing or bundling it.

How do I install Arachnids?

Install the matching loader first, then put the downloaded file in your mods folder and start the game. The loader, the mod and Minecraft all have to be on the same version, which is the usual reason a mod does not appear in game.

Where do I download Arachnids safely?

Start with the author's page on Modrinth, which is where the data here is synced from. MCReference does not host or repackage files. When available, recorded download links go to the source for that release; verify the publisher, filename and any available checksum before running it.

Works on the same versions

Ordered by how much of the recent Minecraft version coverage overlaps, not by popularity.

GeckoLibA 3D animation library for entities, blocks, items, armor, and more!BookshelfAn open source library for other mods!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Enchantment DescriptionsAdds in-game descriptions for enchantments to tooltips.

Details from Modrinth, where the author last updated it on 25 Oct 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Is this information wrong or missing something? .