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Abyssal Descent

Modpack

by Eclipse_Ilx

⛏️ 450+ Block Deep World Cave Exploration/Progression Pack! 🗺️ 25+ Cave Biomes!

Type

Modpack

CurseForge Downloads

840

CurseForge ID

1101583

Last Updated

Oct 21, 2026

Description

This is the official sibling pack to Abyssal Ascent.

Abyssal Descent is a Cave Exploration Vertical Progression modpack where the world is 450+ Blocks deep, split into 5 layers with unique progression, custom caves, bosses, structures and lots of custom mechanics.

  • Full Multiplayer support (E4MC)
  • 3 (12 planned) Layers of Caves to Explore
  • 450+ Blocks Deep (1500+ planned)
  • 25+ Cave Biomes with Custom Generation
  • Custom Progression
  • Tutorial World
  • Exclusive Mods and Content
  • Full Mod Integration
  • ACTUALLY Optimized + Shaders without any bloat or slop (we tested performance mods extensively ourselves the pack can run on 2gbs of allocated RAM on java 21 with arguments listed under requirements) 
  • Custom shader presets

LAYERS

In Abyssal Descent the world is split into layers, with the power of Immersive Portals "dimension stacking" you can mine right through bedrock to seemlessly enter the next layer with no loading screen.

Delvers' Beginnings, is the first layer containing a diverse underground ecosystem rich with valuable resources rarely found in surface caves; Crystal Caverns, Pink salt spikes Lush ancient deltas, unique mobs and bosses from 15+ mods can all be found here!

The Undergarden is a dark, subterranean world located far deep below the Deepslate of the Overworld. The flora here has adapted to their conditions and can grow anywhere, independent of light. Strange creatures call these dark lands home, and are plagued by the invasive Rotspawn, monsters originating from a chaotic, mysterious realm.

The Infernal Crossing is an exceptionally dangerous series of magmatic caves and canyons shrouded in darkness. Giant Centipedes, Ghouls and other horrors reside here waiting to turn any intruders who enter their domain. Conquer (or succumb) to the Infernal Crossing and reap the supernatural rewards this layer offers.

Requirements

ABSOLUTE MINIMUM
Java 17: 4GBs Allocated Memory
Java 21 with Args: 2GBs Allocated Memory RECOMMENDED
Java 17: 8GBs Allocated Memory
Java 21 with Args: 4GBs Allocated Memory

Java 21 ONLY args-XX:+UnlockExperimentalVMOptions -XX:+UseZGC -XX:+ZGenerational -XX:+AlwaysPreTouch

  • Server Pack/official server host
  • Nether, Aether, and Deep Dark Dimension (Next Update)
  • Total Enchanting System Overhaul (Next Update)
  • Primordial Caverns (Dino Layer) 
  • Frozen Waste (Ice Layer)
  • The Abyssopelagic zone (Ocean Layer)
  • Stygian Depths (Custom The Abyss II cave dimension)
  • Noodle/Inverted Cave Dimension
  • The Deep Dark (Custom Deep Dark Dimension)
  • Connected Caves between layers
  • 1500+ blocks deep caves
  • 500+ blocks of sky islands to explore 

DEVELOPMENT

  1. Thousands of lines of data pack json was written exclusively for Abyssal Descent; primarily world gen for the new cave dimensions, we combined content from 10+ mods to create new dimensions with the power of data packs!
  2. A forked version of the undergarden mod with the stoneborn trading system rewritten.
  3. Developed 6 custom Java Mods specifically for the pack

Join our Discord to keep up with development we post development updates all the time! - https://discord.gg/xhKz5pWpuG

DEVELOPERS: Eclipse Ilx & slab
CONTRIBUTORS: mrsketchystuff, DovahFruit/Hiro, Qwerty97474, Dreaming Critting, Greathive, Uni, Aimsell

 

Check out Abyssal Ascent here! - https://www.curseforge.com/minecraft/modpacks/abyssal-ascent

Compatibility

Mod Loaders

Forge

Game Versions

1.20.1

Recommended Gear

Affiliate

Hardware and extras that pair well with this modpack.

As an Amazon Associate I earn from qualifying purchases.

Screenshots

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External Resources