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Reactive AlchemyMinecraft mod for 1.21.1

An alchemy-themed magic mod based around in-world experimentation

client and servernewest supported 1.21.1UtilityGame MechanicsMagic
Latest version
1.21.1-10.2.0
Minecraft
1.18.2 to 1.21.1
Java
Java 21+
Loaders
NeoForge, Forge
Licence
CC-BY-NC-4.0
Downloads
17.8k
Updated
23 h ago
Available on
Modrinth
Space NodeOur hosting

Host Reactive Alchemy servers

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

  • 1.21.1
  • NeoForge
  • 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 Reactive Alchemy declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge, Forge21+declared8 Aug 2024
1.21Forge, NeoForge21+declared13 Jun 2024
1.20.1Forge, NeoForge17+declared12 Jun 2023
1.20Forge, NeoForge17+declared2 Jun 2023
1.19.2NeoForge, Forge17+declared5 Aug 2022
1.18.2Forge, NeoForge17+declared28 Feb 2022

Download

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

All 60 releases
1.21.1-10.2.0release24 Feb 2026

reactive-1.21.1-10.2.0.jar · 1.5 MB · for 1.21.1, 1.21

Download latest
3fdd6489d54f…
Older versions24
  • 1.20.1-10.2.024 Feb 20261.20.11.5 MB649 downloadsb286efb1cd18…Get
  • 1.20.1-10.1.522 Feb 20261.20.11.5 MB32 downloads83659479c682…Get
  • 1.20.1-10.1.422 Feb 20261.20.11.5 MB37 downloads1ed5392aaeac…Get
  • 1.20.1-10.1.320 Feb 20261.20.11.5 MB38 downloads0f24cbb86c4d…Get
  • 1.21.1-10.1.320 Feb 20261.21.1, 1.211.5 MB66 downloads29fa3997fcae…Get
  • 1.21.1-10.1.213 Feb 20261.21.1, 1.211.5 MB62 downloads64f651ed984e…Get
  • 1.20.1-10.1.130 Dec 20251.20.11.5 MB252 downloadsd84432dc37d4…Get
  • 1.21.1-10.1.130 Dec 20251.21.1, 1.211.5 MB154 downloads860eb56c605b…Get
  • 1.20.1-10.1.028 Dec 20251.20.11.4 MB47 downloads873a7925c05b…Get
  • 1.21.1-10.1.028 Dec 20251.21.1, 1.211.5 MB29 downloads8b65ed8411f2…Get
  • 1.20.1-10.0.420 Dec 20251.20.11.4 MB65 downloads4dd37c1081e0…Get
  • 1.21.1-10.0.220 Dec 20251.21.1, 1.211.5 MB96 downloadscf47049c808b…Get
  • 1.20.1-10.0.33 Nov 20251.20.11.4 MB231 downloadsfe31286e2709…Get
  • 1.20.1-10.0.225 Oct 20251.20.11.4 MB80 downloads6fa242b886e1…Get
  • 1.20.1-10.0.124 Oct 20251.20.11.4 MB46 downloads67a624ca9eb9…Get
  • 1.20.1-9.18.519 Oct 20251.20.11.1 MB73 downloadsa64639984c5a…Get
  • 1.21.1-10.0.119 Oct 20251.21.1, 1.211.5 MB235 downloads1c2ff358b622…Get
  • 1.21.1-10.0.07 Aug 20251.21.1, 1.211.5 MB245 downloadsb0acbd4c83c3…Get
  • 1.20.1-9.18.49 Jul 20251.20.11.1 MB490 downloadsfdb15e4cdb33…Get
  • 1.20.1-9.18.314 Mar 20251.20.11.1 MB519 downloads8431b7a09dc3…Get
  • 1.21.1-9.18.313 Mar 20251.21.1, 1.211.1 MB445 downloads6c5a08299f96…Get
  • 1.21.1-9.18.29 Mar 20251.21.1, 1.211.1 MB67 downloads4bbae7c70f58…Get
  • 1.20.1-9.18.29 Mar 20251.20.11.1 MB164 downloadsce789f7881ad…Get
  • 1.21.1-9.18.11 Mar 20251.21.1, 1.211.1 MB138 downloadscdec19585685…Get

Frequently asked

Does Reactive Alchemy work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Reactive Alchemy 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 Reactive Alchemy support?

Everything the author has declared, from 1.18.2 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 Reactive Alchemy 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 Reactive Alchemy 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 Reactive Alchemy?

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 Reactive Alchemy under?

CC-BY-NC-4.0, 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 Reactive Alchemy?

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 Reactive Alchemy 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 27 Sept 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? .