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IanAnderson's ModpackMinecraft modpack for 1.21.1

A mix of the latest mods

newest supported release 1.21.1MagicMultiplayerExplorationExtra Large
Latest version
IA-1.21.1-21.1.25.zip
Minecraft
1.9 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge
Licence
not stated
Downloads
20.7k
Updated
1 mo ago
Available on
CurseForge
Space NodeOur hosting

Host IanAnderson's Modpack servers

One click and IanAnderson's Modpack is installed with the right loader, on hardware built for it.

  • 1.21.1
  • NeoForge
  • Forge
  • One click modpack install
  • Dependencies handled
  • Tuned startup flags
  • NVMe SSD
Deploy a serverFrom €0.90 per GB

Minecraft versions

Every version IanAnderson's Modpack declares support for, newest first, with the Java runtime that version needs.

Other modpacks
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.20.1NeoForge, Forge17+declared12 Jun 2023
1.19.2NeoForge, Forge17+declared5 Aug 2022
1.10.2NeoForge, Forge8+declared23 Jun 2016
1.10NeoForge, Forge8+declared8 Jun 2016
1.9.4NeoForge, Forge8+declared10 May 2016
1.9NeoForge, Forge8+declared29 Feb 2016

Download

From IanAnderson's Modpack’s own host. Nothing is re-hosted here.

Browse 61 indexed releases

Most recently published release

IA-1.21.1-21.1.25.ziprelease5 Oct 2026

IA-1.21.1-21.1.25.zip · 0.8 MB · for 1.21.1 · NeoForge

Download this release
10b7f73628ab…
Older versions24
  • IA-1.21.1-21.1.24.zip27 Sept 20261.21.10.8 MB386c7aed7406…Get
  • IA-1.21.1-21.1.23.zip27 Sept 20261.21.10.8 MB199c36dd6720…Get
  • IA-1.21.1-21.1.22.zip20 Sept 20261.21.10.7 MBf2798d712dc6…Get
  • IA-1.21.1-21.1.21.zip18 Sept 20261.21.117.4 MB1c56700dd4de…Get
  • IA-1.21.1-21.1.20.zip16 Sept 20261.21.10.7 MB4f8512a9b858…Get
  • IA-1.21.1-21.1.19.zip15 Sept 20261.21.10.7 MB1212a556704c…Get
  • IA-1.21.1-21.1.18.zip11 Sept 20261.21.10.7 MBa37c3064cca0…Get
  • IA-1.21.1-21.1.17.zip11 Sept 20261.21.10.7 MB6b09c217504f…Get
  • IA-1.21.1-21.1.16.zip8 Sept 20261.21.10.7 MB434f6f9855d2…Get
  • IA-1.21.1-21.1.15.zip4 Sept 20261.21.10.7 MB8fd1a9a47622…Get
  • IA-1.21.1-21.1.14.zip31 Aug 20261.21.10.7 MBe63cd0c10063…Get
  • IA-1.21.1-21.1.13.zip28 Aug 20261.21.10.6 MBe878d6027aa6…Get
  • IA-1.21.1-21.1.12.zip21 Aug 20261.21.10.6 MBa4b15bfa34cb…Get
  • IA-1.21.1-21.1.11.zip21 Aug 20261.21.10.6 MBca1a39b7c6cb…Get
  • IA-1.21.1-21.1.10.zip19 Aug 20261.21.10.6 MBcc04de5189ba…Get
  • IA-1.21.1-21.1.9.zip17 Aug 20261.21.10.6 MBbcfb77985866…Get
  • IA-1.21.1-21.1.8.zip16 Aug 20261.21.10.6 MB52bf01274f22…Get
  • IA-1.21.1-21.1.7.zip14 Aug 20261.21.10.5 MB0570996d6f18…Get
  • IA-1.21.1-21.1.6.zip14 Aug 20261.21.10.4 MB900f79c2764d…Get
  • IA-1.21.1-21.1.5.zip8 Aug 20261.21.10.4 MB58c80cb03b89…Get
  • IA-1.21.1-21.1.4.zip4 Aug 20261.21.10.4 MB8 downloads1eb2a0537015…Get
  • IA-1.21.1-21.1.3.zip3 Aug 20261.21.10.4 MB8 downloads6193c811f530…Get
  • IA-1.21.1-21.1.2.zip2 Aug 20261.21.10.4 MB11 downloadsec47560a0ced…Get
  • IA-1.21.1-21.1.1.zip2 Aug 20261.21.10.4 MBd11a1156516b…Get

Frequently asked

Does IanAnderson's Modpack work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version IanAnderson's Modpack 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 IanAnderson's Modpack support?

Everything the author has declared, from 1.9 up to 1.21.1. The full list is in the table above, with the Java runtime each version needs next to it.

Which platform or loader does IanAnderson's Modpack support?

NeoForge, 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 IanAnderson's Modpack?

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.

How do I install IanAnderson's Modpack?

Use a launcher that imports packs, such as Prism Launcher, the Modrinth App or the CurseForge app, and open the pack file with it. The launcher installs the right loader and mods for you; installing a pack's mods by hand is the error-prone way.

Where do I download IanAnderson's Modpack safely?

Start with the author's page on CurseForge, 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.

MAX FPS: Optimized🚀 MAX FPS WITHOUT UNNECESSARY MODS! Only 16 optimization mods - NOTHING EXTRA! ✅ ALL MAJOR VERSIONS ⚡ INSTALLS ON ANY LAUNCHER! (Guide below)Simply Optimized ReloadedAn unofficial port of Simply Optimized built to support every major mod loader and stay current with the newest versions of Minecraft.[BRE] Block Railway Engineering: MTR, Create, IR and more!The Full-contents Edition and Fly Edition of the Block Railway Engineering Modpack, including MTR, Create and other basic mods for players to create a railway world.ElixirA well-researched performance & optimization modpack to make the game run smoother! With shader & Fresh Animations support. 26.3 ✔Extreme Optimization!Threaten your game to run fasterJust Enough OptimizationJust Enough Optimization - Focused on low memory usage and higher avarege fps. Made for low-end pc so everyone can run Minecraft

Details from CurseForge, where the author last updated it on 5 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? .