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Alex’s Caves – Six Rare Underground Biomes with Unique Mobs and Blocks V2.3.3

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Creator: AlexModGuy

File verified — safe
All 58 security engines found this file clean.
Last checked: 2026-09-06
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Features:

  • Six exceedingly rare cave biomes added to the Overworld
  • Magnetic Caves Primordial Caves and Toxic Caves
  • Abyssal Chasm Forlorn Hollows and Candy Cavity
  • Every biome adds unique blocks items mobs and mechanics
  • Underground Cabins are the way in and can appear anywhere
  • Loot barrels hold cave tablets and the Cave Compendium guide book
  • Custom ambient particles fog brightness and light colour per biome
  • Recommended to play without shaders
  • Built-in compatibility with Just Enough Items and Alex’s Mobs
  • Requires Citadel
  • Forge and NeoForge support for Minecraft 1.20.x
  • Made by AlexModGuy

Alex’s Caves adds six new cave biomes to the Minecraft Overworld and makes you work to find them. The Magnetic Caves, Primordial Caves, Toxic Caves, Abyssal Chasm, Forlorn Hollows and Candy Cavity are all exceedingly rare compared with normal biomes, and each one carries its own blocks, items, mobs and mechanics, which turns them into subterranean destinations worth preparing an expedition for.

The way in is an Underground Cabin, which can be discovered anywhere in the Overworld. Its loot barrels contain cave tablets and the Cave Compendium, an in-game guide book that provides the knowledge needed to find and explore every biome the mod adds, so getting started is taught inside the game instead of leaving you to guess where to dig.

This is a large mod with a great deal of effort put into the look and feel of each biome. Every one of them can have its own ambient particles, fog, brightness and light colour, which is why it is recommended to play without shaders, since many shader packs alter or worsen that carefully built appearance. Built-in compatibility with Just Enough Items and Alex’s Mobs is included as well.

✅ Description reviewed by the CrashMods Team

Changelog

V2.3.3 — First release.
Frequently asked questions6 questions

Alex’s Caves – which game and version is it for?

This mod was made for Minecraft (game version: 1.20.1). The mod's own version: V2.3.3. After a major game update, older mods may stop working — check the version before installing.

Alex’s Caves – how do I install it?

Install the mod loader that matches the mod's Minecraft version (Forge or Fabric), then put the .jar file in the .minecraft/mods folder.

Is the download safe?

We checked the file with VirusTotal: none of the 58 antivirus engines flagged it. The full report opens from the "Verified" badge on the mod's page.

How big is the download?

The mod's file size is about 71.4 MB.

Alex’s Caves – who made it?

The mod's original creator: AlexModGuy.

Is the mod free?

Yes, downloading from CrashMods is free; registration is not required.

Download Get the latest version of this mod and enjoy!

Mod version: V2.3.3 Minecraft 1.20.1 2 months ago 71.4 MB
Alex’s Caves – Six Rare Underground Biomes with Unique Mobs and Blocks V2.3.3 71.4 MB Minecraft Download File

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