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Darker Depths Mod for Minecraft 1.20.1, 1.21.1

A mod to expand the underground!

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Updated 17.10.2026
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About the Darker Depths mod

Darker Depths — screenshot 3

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Darker Depths is a underground expansion mod.

Darker Depths — screenshot 3

There are currently 3 biomes added to Darker Depths:

Glowshroom Forest

The glowshroom cavern is where you will find large glowshrooms, the glowshroom monster, glowgrime, and the Glowshroom Cap.

The Glowshroom Cap when worn, has limited durability, provides light, and also provides the user haste 1.

Sandy Catacombs

The Sandy Catacombs is a desolate wasteland. Petrified roots hang from the ceiling, aridrock & boulders dot the inner cave landscape.

A new class of mob without souls can be found here. They wander the catacombs in the hopes of binding with their next victim.

Void Soul mobs when killed, don't die, but rather are turned into Void Souls. This orb is invulnerable, but will expire after 60 seconds. Upon right clicking with a glass bottle, Void Souls can be captured into a jar. Right clicking with Amber stops them from expiring.

A new structure is found here, aptly named the Catacombs, where you will find Body Snatchers, Void Soul Knights, Tombs, Paranoia, and Forsaken Bronze.

Cursed by the presence of the Void Souls, this Forsaken Bronze allows for unnatural abilities. This metal can be used to craft a few useful items, including the Death Anchor, the Stiletto, and Tombs.

Molten Cavern

The Molten Cavern is a raging hot biome, where Deepslate has turned into Darkslate and lava can be found in layered pools. Geysers, Amber Clusters, and Dead Living Crystals can be found here.

Dead Living Crystals can be reawakened by giving them a diamond. From there, they will start to grow back to life. When they have fully grown, they will turn into Living Crystal, which can spread to nearby diamond ore, or grow a taste for Melons, if you give them enough time.

Crystal Melons are formed when a Living Crystal has a hunger for Melons. Placing a Melon near a living crystal will cause it to turn into a stone melon, then growing inside until it finally breaks free of its shell, converting to a Crystal Melon.

Crystal Melons when used while in the offhand, will supercharge any tool to make it unbreakable, give 20% more attack speed, mining speed, and attack damage, for 5 minutes. (Adjustable via config)

Wiki found here: Wiki

Darker Depths — screenshot 4

How to install Darker Depths

With Millida Launcher

  1. Install Millida Launcher

    The launcher is free: download it at millida.net/launcher and sign in with any nickname.

  2. Click “Install” on this page

    The launcher opens and installs the mod for Minecraft 1.16.1–1.21.1 on Forge or NeoForge automatically.

  3. Launch the game

    A profile with it appears in the launcher: click “Play”.

Manually

  1. Install Forge or NeoForge

    The loader must match the game version of the mod file, for example Minecraft 1.21.1. After installing it, a separate profile appears in your launcher.

  2. Download the file for your version

    In the version list above, pick the file darkerdepths-2.1.6.jar (2.0 MB) for your game version and loader.

  3. Put it in the mods folder

    The folder is inside .minecraft (Windows: %appdata%\.minecraft\mods). If it does not exist, create it.

  4. Launch the loader profile

    Open “Mods” in the main menu: Darker Depths should be in the list.

Minecraft 1.21.1 runs on Java 21: with a different Java version the game may close right after launch.

Versions

With dependencies

MinecraftLoaderFileDateActions
1.21.1NeoForgeDarker Depths 2.1.6 - 1.21.12 MB 3
1.20.1ForgeDarker Depths 2.1.5 - 1.20.12 MB 3
1.20.1ForgeDarker Depths 2.1.0-beta.12 MB
1.21.1NeoForgeDarker Depths 2.0.0-beta.21.6 MB
1.16.1ForgeDarkerDepths-1.16.1-1.0.1.jar453 KB

FAQ

Which Minecraft versions does Darker Depths work on?

There are files for 1.21.1, 1.20.1, 1.16.1. The newest is 1.21.1.

Is Darker Depths for Forge or Fabric?

There are files for Forge: 1.16.1–1.20.1 and for NeoForge: 1.21.1. There are no files for Fabric: a mod for another loader will not start.

Does Darker Depths need other mods?

The author lists no required dependencies: the Forge or NeoForge loader is enough.

Which Java does Darker Depths need?

Minecraft 1.21.1 runs on Java 21. If the game closes right after launch, the usual cause is the wrong Java version in the profile settings.

Where can I download Darker Depths safely?

On this page: the file darkerdepths-2.1.6.jar (2.0 MB) is stored on Millida’s server, with no link shorteners. SHA-1 checksum: 748a1c3694df35ae8373dc293725e3aff13e9831.

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