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Simulated AdditionMinecraft mod for 1.21.1

A small add-on for Create: Simulated and Create: Aeronautics. It adds highly requested features for players.

client and servernewest supported 1.21.1TechnologyTransportation
Latest version
1.0.2
Minecraft
1.21.1
Java
Java 21+
Loader
NeoForge
Licence
MIT
Downloads
11.6k
Updated
4 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Simulated Addition servers

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

  • 1.21.1
  • 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 Simulated Addition declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1NeoForge21+declared8 Aug 2024

Download

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

1.0.2release17 May 2026

simulated_addition-1.0.2.jar · 0.3 MB · for 1.21.1

Download latest
2ca063650a83…
Older versions2
  • 1.0.115 May 20261.21.10.3 MB403 downloads43f2ad8d01c9…Get
  • 1.0.013 May 20261.21.10.2 MB54 downloadsaaa16a67d9e5…Get

Frequently asked

Does Simulated Addition work on Minecraft 1.21.1?

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

Do I need to install Simulated Addition 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 Simulated Addition 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 Simulated Addition?

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 Simulated Addition 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 Simulated Addition?

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 Simulated Addition 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 17 May 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? .