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Nicos BackslotsMinecraft mod for 1.21.1

A simple Backslot mod

client and servernewest supported release 1.21.1UtilityAdventureEquipmentGame Mechanics
Latest version
1.19.4-1.4.0.0
Minecraft
1.19 to 1.21.1
Java
Java 21+
Loaders
Quilt, Fabric
Licence
GPL-3.0-or-later
Downloads
2.8k
Updated
10 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Nicos Backslots servers

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

  • 1.21.1
  • Quilt
  • Fabric
  • 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 Nicos Backslots declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Quilt, Fabric21+declared8 Aug 2024
1.20.1Quilt, Fabric17+declared12 Jun 2023
1.19.4Fabric, Quilt17+declared14 Mar 2023
1.19.3Quilt, Fabric17+declared7 Dec 2022
1.19.2Quilt, Fabric17+declared5 Aug 2022
1.19.1Quilt, Fabric17+declared27 Jul 2022
1.19Fabric, Quilt17+declared7 Jun 2022

Download

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

For Minecraft 1.21.1

Choose the loader you use before downloading.

Most recently published release

1.19.4-1.4.0.0release7 Dec 2025

nicos_backslots-1.19.4-1.4.0.0.jar · 51 KB · for 1.19.4 · Fabric, Quilt

Choose file on publisher ↗
e2727414320b…
Older versions10

Frequently asked

Does Nicos Backslots work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Nicos Backslots 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 Nicos Backslots support?

Everything the author has declared, from 1.19 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 Nicos Backslots 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 Nicos Backslots support?

Quilt, Fabric. 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 Nicos Backslots?

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 Nicos Backslots under?

GPL-3.0-or-later, 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 Nicos Backslots?

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 Nicos Backslots 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 7 Dec 2025. 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? .