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Advanced Compounds & AlloysMinecraft mod for 1.21.8

AC&A is a very large mod mainly based around science. It is MOSTLY scientifically accurate, but of course not completely, some things are simplified for gameplay (though not massively) and some things I have not been able to find good sources.

client and servernewest supported release 1.21.8TechnologyUtilityAdventureEquipment
Latest version
1.7.1
Minecraft
1.21.4 to 1.21.8
Java
Java 21+
Loader
NeoForge
Licence
LicenseRef-All-Rights-Reserved
Downloads
202
Updated
4 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Advanced Compounds & Alloys servers

One click and Advanced Compounds & Alloys is installed with the right loader, on hardware built for it.

  • 1.21.8
  • 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 Advanced Compounds & Alloys declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.8NeoForge21+declared17 Jul 2025
1.21.4NeoForge21+declared3 Dec 2024

Download

From Advanced Compounds & Alloys’s own host. Nothing is re-hosted here.

Most recently published release

1.7.1release10 Jul 2026

advanced_compounds__alloys-1.7 The Environmental Update Pt. 1-neoforge-1.21.8.jar · 9.7 MB · for 1.21.8 · NeoForge

Download this release
c865ebd8a308…
Older versions13
  • 1.619 May 20261.21.89.6 MB18 downloadsb7e8cb28c396…Get
  • 1.5.3.326 Mar 20261.21.89.2 MB20 downloads96dc614e3bb8…Get
  • 1.5.2.214 Feb 20261.21.88.7 MB38 downloadsd6b8db28f86e…Get
  • 1.5.1.115 Jan 20261.21.86.1 MB39 downloads7d5499da824a…Get
  • 1.4.315 Jan 20261.21.85.4 MB9 downloads038462fa3583…Get
  • 1.4.215 Jan 20261.21.85.3 MB5 downloadsbf1ba6d09e3c…Get
  • 1.415 Jan 20261.21.45.0 MB20 downloads4998c70b933b…Get
  • 1.3.815 Jan 20261.21.43.9 MB6 downloadsb86619e704d6…Get
  • 1.3.7.415 Jan 20261.21.43.8 MB6 downloads864c4efed798…Get
  • 1.3.6.1.315 Jan 20261.21.43.8 MB8 downloads323d898a08d7…Get
  • 1.3.6.1.2.515 Jan 20261.21.42.6 MB6 downloadsd68a8a908c2b…Get
  • 1.3.6.1.215 Jan 20261.21.42.6 MB7 downloadsff7e7e85bdac…Get
  • 1.3.5.1.115 Jan 20261.21.41.1 MB9 downloads27cf430e06a8…Get

Frequently asked

Does Advanced Compounds & Alloys work on Minecraft 1.21.8?

Yes. 1.21.8 is the newest Minecraft version Advanced Compounds & Alloys 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 Advanced Compounds & Alloys support?

Everything the author has declared, from 1.21.4 up to 1.21.8. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Advanced Compounds & Alloys 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 Advanced Compounds & Alloys support?

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 Advanced Compounds & Alloys?

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 licence is Advanced Compounds & Alloys under?

LicenseRef-All-Rights-Reserved, 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 Advanced Compounds & Alloys?

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 Advanced Compounds & Alloys 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.

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Details from Modrinth, where the author last updated it on 10 Jul 2026. We do not host files or republish descriptions. Available download links point to the author’s own release.

Not indexed yet. Score 52 against a threshold of 55. The page still exists and is still linked; it simply carries noindex until we hold more.

Is this information wrong or missing something? .