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Infested: Swarms and SpidersMinecraft mod for 1.21.1

Expands the role of Minecraft's Spiders and Silverfish, as well as adding new mobs, armors, enchantments, and items.

client and servernewest supported 1.21.1AdventureMobsEquipmentGame Mechanics
Latest version
2.4.2
Minecraft
1.20.1 to 1.21.1
Java
Java 21+
Loaders
Forge, NeoForge
Licence
MIT
Downloads
5.6k
Updated
5 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Infested: Swarms and Spiders servers

One click and Infested: Swarms and Spiders is installed with the right loader, on hardware built for it.

  • 1.21.1
  • Forge
  • NeoForge
  • 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 Infested: Swarms and Spiders declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Forge, NeoForge21+declared8 Aug 2024
1.21Forge, NeoForge21+declared13 Jun 2024
1.20.4Forge, NeoForge17+declared7 Dec 2023
1.20.1Forge, NeoForge17+declared12 Jun 2023

Download

From Infested: Swarms and Spiders’s own host. Nothing is re-hosted here.

2.4.2release22 Apr 2026

infested_swarms_spiders-2.4.2-forge-neoforge-1.20.1.jar · 0.6 MB · for 1.20.1

Download latest
48fa258bd97a…
Older versions23
  • 2.4.1_neoforge_1.2113 Sept 20251.21.1, 1.210.5 MB259 downloadse4382fd76035…Get
  • 2.4.1_forge-neoforge-1.20.113 Sept 20251.20.10.6 MB541 downloadse2d3b78a5ec1…Get
  • 2.4.0-neoforge-1.2129 Apr 20251.21.1, 1.210.5 MB218 downloads8c44c1a0c1da…Get
  • 2.4.0-forge-neoforge-1.20.129 Apr 20251.20.10.6 MB1.9k downloadse67830596eaf…Get
  • 2.3.0-neoforge-1.2113 Apr 20251.21.1, 1.210.4 MB62 downloadsdba3d0854881…Get
  • 2.3.0-forge-neoforge-1.20.113 Apr 20251.20.10.5 MB139 downloads793a0b577170…Get
  • 2.2.1-neoforge-1.219 Apr 20251.21.1, 1.210.4 MB55 downloads4d7623b798b8…Get
  • 2.2.1-forge-neoforge-1.20.19 Apr 20251.20.10.4 MB74 downloads94f13512f205…Get
  • 2.2.0-forge-neoforge-1.20.14 Apr 20251.20.10.4 MB60 downloads7e300e436178…Get
  • 2.2.0-neoforge-1.214 Apr 20251.21.1, 1.210.4 MB66 downloads02269375a4b1…Get
  • 2.1.2-NeoForge-1.2124 Jan 20251.21.1, 1.210.4 MB82 downloads9397af618966…Get
  • 2.1.2-Forge-NeoForge-1.20.124 Jan 20251.20.10.5 MB217 downloadsac03e3e682c6…Get
  • 2.1.1-neoforge-1.2114 Jan 20251.21.1, 1.210.4 MB63 downloadsde29061db7b0…Get
  • 2.1.1-forge-neoforge-1.20.114 Jan 20251.20.10.5 MB60 downloads1ff4447cc9bd…Get
  • 2.1.0-NeoForge26 Oct 20241.21.1, 1.210.4 MB84 downloadsad159700dca1…Get
  • 2.1.0-1.20.1-Forge-Neoforge26 Oct 20241.20.10.5 MB156 downloads600ad150654a…Get
  • 2.0.18 Sept 20241.21.1, 1.210.4 MB102 downloads7fa1609b2f2f…Get
  • 2.0.2-1.20.18 Sept 20241.20.10.4 MB155 downloadsaa836ff2c3e4…Get
  • 2.0.1-1.20.131 Aug 20241.20.10.4 MB86 downloads6ec143cfecdc…Get
  • 2.0.0-1.20.123 Aug 20241.20.10.4 MB108 downloads0003119a399c…Get
  • 1.0.214 Jul 20241.20.40.5 MB144 downloads7681f96564ca…Get
  • 1.0.120 Jun 20241.20.40.5 MB112 downloads8049a3c65a68…Get
  • 1.0.012 Jun 20241.20.40.4 MB95 downloads66a8a9036a61…Get

Frequently asked

Does Infested: Swarms and Spiders work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Infested: Swarms and Spiders 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 Infested: Swarms and Spiders support?

Everything the author has declared, from 1.20.1 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 Infested: Swarms and Spiders 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 Infested: Swarms and Spiders support?

Forge, NeoForge. 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 Infested: Swarms and Spiders?

On the newest Minecraft version it supports, Java 21 or newer. The requirement comes from the Minecraft version you run rather than from the mod itself, so on an older supported Minecraft the answer is that version's Java, not this one.

What licence is Infested: Swarms and Spiders 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 Infested: Swarms and Spiders?

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 Infested: Swarms and Spiders 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. The download link goes to the source recorded for that release; verify the publisher, filename and checksum before running it.

Works on the same versions

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

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Details from Modrinth, where the author last updated it on 22 Apr 2026. We do not host files and we do not republish descriptions; every download link points at the author’s own release.

Is this information wrong or missing something? .