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CosmicoreMinecraft mod for 1.21.5

Explore the world for the strange space stones, but beware the skies because- METEORS INCOMING!

client and servernewest supported 1.21.5TechnologyAdventureEquipmentWorldgen
Latest version
1.0.0
Minecraft
1.21 to 1.21.5
Java
Java 21+
Loader
NeoForge
Licence
MIT
Downloads
11.6k
Updated
18 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Cosmicore servers

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

  • 1.21.5
  • 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 Cosmicore declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.5NeoForge21+declared25 Mar 2025
1.21.4NeoForge21+declared3 Dec 2024
1.21.1NeoForge21+declared8 Aug 2024
1.21NeoForge21+declared13 Jun 2024

Download

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

1.0.0release8 Apr 2025

cosmicore-1.0.0.jar · 0.8 MB · for 1.21.5

Download latest
baa0cff0fb90…
Older versions6
  • 1.1.012 Feb 20251.21.40.8 MB107 downloads4a7026e48b8f…Get
  • 1.0.25 Feb 20251.21.40.7 MB55 downloadsf6c16d3d789b…Get
  • 1.0.112 Jan 20251.21.40.7 MB84 downloads92b8a93d5115…Get
  • 1.1.0-beta30 Aug 20241.21.1, 1.210.4 MB1.3k downloads948085e8f995…Get
  • 1.0.0-beta18 Aug 20241.21.1, 1.210.4 MB515 downloads1546ca2d9439…Get
  • 1.0.0-alpha11 Aug 20241.21.1, 1.210.4 MB93 downloadsaaf9609933cd…Get

Frequently asked

Does Cosmicore work on Minecraft 1.21.5?

Yes. 1.21.5 is the newest Minecraft version Cosmicore 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 Cosmicore support?

Everything the author has declared, from 1.21 up to 1.21.5. The full list is in the table above, with the Java runtime each version needs next to it.

Do I need to install Cosmicore 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 Cosmicore 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 Cosmicore?

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 Cosmicore 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 Cosmicore?

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 Cosmicore 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 8 Apr 2025. 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? .