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Nether Depths UpgradeMinecraft mod for 1.21.1

Nether Depths Upgrade is a small mod that adds some extra flora and fauna to the lava seas of the nether. A total of nine fish have been added, a new enchant and potion in order to explore the lava in the nether.

client and servernewest supported release 1.21.1AdventureMobsDecorationFood
Latest version
3.3
Minecraft
1.16.5 to 1.21.1
Java
Java 21+
Loaders
Fabric, NeoForge, Forge
Licence
MIT
Downloads
3.3M
Updated
1 mo ago
Available on
Modrinth
Space NodeOur hosting

Host Nether Depths Upgrade servers

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

  • 1.21.1
  • Fabric
  • 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 Nether Depths Upgrade declares support for, newest first, with the Java runtime that version needs.

Other mods
MinecraftThroughJavaEvidenceReleased
1.21.1Fabric, NeoForge, Forge21+declared8 Aug 2024
1.21Fabric, NeoForge, Forge21+declared13 Jun 2024
1.20.1NeoForge, Forge, Fabric17+declared12 Jun 2023
1.20Fabric, NeoForge, Forge17+declared2 Jun 2023
1.19.2Forge, Fabric, NeoForge17+declared5 Aug 2022
1.19.1NeoForge, Forge, Fabric17+declared27 Jul 2022
1.19Fabric, NeoForge, Forge17+declared7 Jun 2022
1.18.2Forge, NeoForge, Fabric17+declared28 Feb 2022
1.16.5Forge, NeoForge, Fabric8+declared14 Jan 2021

Download

From Nether Depths Upgrade’s own host. Nothing is re-hosted here.

Browse 30 indexed releases

For Minecraft 1.21.1

Choose the loader you use before downloading.

  • NeoForge

    3.3 · 21 Sept 2026 · netherdepthsupgrade-3.3-1.21.1-NeoForge.jar

    Get NeoForge

  • Fabric

    3.3+1.21.1-fabric · 21 Sept 2026 · netherdepthsupgrade-3.3+1.21.1-fabric.jar

    Get Fabric

Most recently published release

3.3release21 Sept 2026

netherdepthsupgrade-3.3-1.21.1-NeoForge.jar · 0.6 MB · for 1.21.1, 1.21 · NeoForge

Download this release
1291fd5a9c57…
Older versions24
  • 3.3+1.21.1-fabric21 Sept 20261.21.10.5 MB9e4ae1c570a8…Get
  • fabric-3.2+1.21.121 Aug 20261.21.1, 1.210.5 MB5867be88de96…Get
  • 3.221 Aug 20261.21.1, 1.210.6 MB5b1f3a1d7c72…Get
  • 3.1.9+1.21-fabric16 Apr 20251.21.1, 1.210.5 MB137.1k downloads27987e25a2a3…Get
  • 3.1.816 Apr 20251.21.1, 1.210.6 MB51.5k downloadsd06d6134a5b9…Get
  • 3.1.71 Sept 20241.21.1, 1.210.6 MB10.7k downloadsd75a988f559c…Get
  • fabric-3.1.8-1.211 Sept 20241.21.1, 1.210.5 MB9.9k downloads2486632b5428…Get
  • fabric-3.1.7-1.2122 Jun 20241.210.5 MB5.7k downloadsa169b64d52f8…Get
  • 3.1.622 Jun 20241.210.6 MB277 downloads273b3a386b58…Get
  • 3.1.6-1.2120 Jun 20241.210.5 MB206 downloadsbb377b383e52…Get
  • 3.1.5-1.2120 Jun 20241.210.6 MB109 downloads59a89cdd9c74…Get
  • fabric-3.1.6-1.2013 May 20241.20.1, 1.200.6 MB1.1M downloadsef650eaaedcc…Get
  • 3.1.5-1.2013 May 20241.20.1, 1.200.6 MB1.3M downloads5d18bf1321d5…Get
  • fabric-3.1.5-1.203 Mar 20241.20.1, 1.200.6 MB12.5k downloadsd071271780a0…Get
  • fabric-3.1.5-1.19.23 Mar 20241.19.20.6 MB5.1k downloadsa12cd1296d1d…Get
  • fabric-3.1.4-1.202 Mar 20241.20.1, 1.200.6 MB214 downloads0fbaa64671fc…Get
  • fabric-3.1.4-1.19.22 Mar 20241.19.20.6 MB120 downloadsd74d5f0ee41e…Get
  • 3.1.4-1.202 Mar 20241.20.1, 1.200.6 MB2.9k downloads887b03645c83…Get
  • 3.1.4-1.19.22 Mar 20241.19.20.6 MB7.3k downloads061f5da43cb1…Get
  • fabric-3.1.3-1.19.28 Feb 20241.19.20.6 MB831 downloads6060494a03ee…Get
  • fabric-3.1.3-1.208 Feb 20241.20.1, 1.200.6 MB8.4k downloadsfc5edc4b5e50…Get
  • 3.1.3-1.19.28 Feb 20241.19.20.6 MB304 downloadsa0ef68ac1055…Get
  • 3.1.3-1.208 Feb 20241.20.1, 1.200.6 MB769 downloadse08ae8a6fc91…Get
  • 2.0.1-1.16.523 Nov 20231.16.51.3 MB5.3k downloads52bc30c799bc…Get

Dependencies

What Nether Depths Upgradedeclares it needs, from the author’s own release metadata. A required one has to be installed alongside it or it will not load.

GeckolibRequired. A 3D animation library for entities, blocks, items, armor, and more!

Frequently asked

Does Nether Depths Upgrade work on Minecraft 1.21.1?

Yes. 1.21.1 is the newest Minecraft version Nether Depths Upgrade 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 Nether Depths Upgrade support?

Everything the author has declared, from 1.16.5 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 Nether Depths Upgrade 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 Nether Depths Upgrade support?

Fabric, 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 Nether Depths Upgrade?

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 does Nether Depths Upgrade need to run?

It declares Geckolib as required, so that has to be installed alongside it or it will not load. Each one is linked in the dependencies section above.

What licence is Nether Depths Upgrade 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 Nether Depths Upgrade?

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 Nether Depths Upgrade 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.

BookshelfAn open source library for other mods!GeckoLibA 3D animation library for entities, blocks, items, armor, and more!Cloth Config API (Fabric/Forge/NeoForge)Config Screen API for MinecraftJourneyMapReal-time map used for mapping in-game or your browser as you explore.Architectury APIAn intermediary api aimed to ease developing multiplatform mods.Jade 🔍Shows information about what you are looking at. (Hwyla/WAILA fork for Minecraft 1.16+)

Details from Modrinth, where the author last updated it on 21 Sept 2026. 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? .