The Undergarden
by quek
Deep underground, The Undergarden adds a dark subterranean dimension reached through a portal activated with a crafted item, for Forge and NeoForge.
What it does
The mod adds a dark world below the bedrock of the Overworld. Plants there grow without light, and strange creatures live among them. Rotspawn, monsters from a chaotic realm, spread through these lands and make them hazardous to explore.
To enter, a player crafts a key item and builds a portal frame from Stone Bricks or Deepslate Bricks, then activates it by clicking the bottom of the frame with that item. Bricks derived from the Undergarden can replace the vanilla bricks. The mod is built for Forge and NeoForge and runs on client and server, so both the server and every player need it. Its files cover 1.20.1, 1.20.4, 1.20.6, 1.21, 1.21.1 and 26.1.2, with the latest NeoForge build at 0.9.8 for 26.1.2. It is not open source and is released under All rights reserved.
Several catalog mods depend on The Undergarden, including NoCube's Undergarden Delight, Spartan Weaponry: Undergarden and Undergarden Paths. The mod itself has no required dependencies listed.
Key features
Subterranean dimension
A whole new dimension to explore, build in and survive in, located beneath the Overworld bedrock.
Rotspawn threat
Invasive monsters from a chaotic realm roam the dark lands and must be dealt with while exploring.
Fifteen biomes
Fifteen biomes give the underground world varied terrain, with flora adapted to grow without light.
Ores with combat effects
Ores gain distinct traits once forged into tools and weapons, so mining the underground shapes combat.
Four potion effects
Four special potion effects are added, along with more than ten unique entities and a dungeon.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Required by 5 mods
Use cases
Underground exploration
Players who want a deeper world beyond the Overworld can build a base in the dimension and gather its ores.
Who it’s for: Players and server owners who want a subterranean dimension with new creatures, ores and a dungeon to explore on Forge or NeoForge.
How it compares
Deeper and Darker is another deep-dark dimension mod, open source under the GNU Affero General Public License v3.0 only, with Fabric, Forge, NeoForge and Quilt files for 1.19.1 – 1.21.1. Ice and Fire is open source under the GNU Lesser General Public License v3.0 only, with Forge and NeoForge files for 1.10.2 – 1.20.1, and adds dragons rather than an underground world. The Undergarden is not open source, and its Forge and NeoForge files cover 1.20.1 – 26.1.2.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| The Undergarden | Forge and NeoForge | 1.20.1 – 26.1.2 | Client and server | 2026-08-24 |
| Deeper and Darker | Fabric, Forge, NeoForge and Quilt | 1.19.1 – 1.21.1 | Client and server | 2026-07-11 |
| Ice and Fire | Forge and NeoForge | 1.10.2 – 1.20.1 | Client and server | 2024-08-15 |
Questions
Does The Undergarden need to be installed on the server?
Which loaders does The Undergarden support?
Which mods require The Undergarden?
In the catalog
The Undergarden is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 15,189 mods support Minecraft 26.1.2.
Similar mods
What the author says
The Undergarden is a dark, subterranean world located deep below the bedrock 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…
Official listing
- Modrinth page
- modrinth.com/mod/the-undergarden
- Owner
- quek
- Published
- 2023-11-06
- Updated on Modrinth
- 2026-08-24
- Facts verified
- 2026-10-15