Subcaverna for Hytale

What this mod does

Subcaverna adds a new world to Hytale inside a gigantic cavern, with lava, underground forests and strange life. It’s published by paulevs on CurseForge, and version 0.5.3, released October 16, 2026, is the one tagged for Hytale 0.7.

What’s inside

• Persistent world: you enter through its own portal, and whatever you build stays when you leave; it doesn’t vanish on a timer.
• Biomes: the Jalumine, Ossurian and Solarum forests, a meadow (Sensory Meadow) and barren areas such as the lava ocean, the gravel and obsidian shores, the ametrine cave, the lava terraces and the basalt pillars.
• Materials: each tree comes with its own wood set, and there’s a new ore, orichalcum, for tools, weapons and decor.
• Useful blocks, furniture, plants, decorative stone and creatures such as fireflies.

What’s new for Update 7

Version 0.5.0 (October 12) adapted the mod to 0.7 and added orichalcum daggers, hammer and spear, braziers and new wildlife near the lava. Version 0.5.3 adds a dedicated cave map and an early prototype of rivers with river valleys.

The author warns that it’s in early development and will change a lot. It doesn’t need any other mods. If you like alternate worlds, also check out Below Every Heaven.

Requirements

• Hytale (Early Access) on PC, version 0.7 (file Subcaverna-0.5.3.jar)
• No dependencies: CurseForge doesn't list any required mod
• New world: you get there through the mod's own portal

How to install it

1. Open the Subcaverna page on CurseForge and click Install to install it with the CurseForge app, or download Subcaverna-0.5.3.jar from the Files tab (the file tagged 0.7).
2. If you download it manually, copy the .jar as is, without unzipping it, into your mods folder: on Windows %APPDATA%\Hytale\UserData\Mods.
3. Open Hytale, right-click the world, check Subcaverna in the mod list and save the settings.
4. In-game, build the mod's portal to travel to the cavern; whatever you build there is saved.
5. If you're updating from an older version, back up your world: the author warns the mod is in early development.

Version history

1. 0.5.316 Oct 2026Current

   Dedicated cave map, prototype rivers with river valleys and fixes for trees, plants and particles

2. 0.5.012 Oct 2026

   Hytale 0.7 support; orichalcum weapons, braziers and wildlife near the lava

3. 0.1.028 Aug 2026

   First release (Hytale 0.6)

Common problems