Beneath
by eerussianguy
Beneath is a Forge and NeoForge world generation mod that builds a cursed underground dimension filled with strange creatures, ore veins and collapsing blocks.
What it does
Beneath adds a full-featured nether expansion built on TerraFirmaCraft. Players find much of what the TFC overworld offers, but in a dark, dangerous underground world where great rewards are placed next to great risks. Ore veins, collapsing blocks, trees and farming all change the way players gather and build.
Installation needs Patchouli and TerraFirmaCraft on both the server and every player's client. Just Enough Items is optional and adds recipe lookup. Beneath runs on client and server, is published for Forge and NeoForge across two game versions, and is released under the MIT License. It is not open source. Its code is public and its issue tracker and wiki are linked from the project page.
The mod is aimed at players who want a harder survival world and at server owners who run TerraFirmaCraft and want a second dimension to explore.
Key features
Underground dimension
A cursed world beneath the surface holds strange creatures and hazards that players must prepare for before exploring.
Ore veins and collapsing blocks
Mining can bring down blocks around the player, so supports and planning matter underground.
Trees and farming
Trees and crops are included, giving players a way to sustain themselves in the dimension.
TerraFirmaCraft integration
Beneath extends the TerraFirmaCraft overworld with a nether expansion that uses the same systems.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Survival playthroughs
Players who want more difficulty can use the dimension as a long-term goal after the overworld is established.
TFC server expansion
Server owners can give a TerraFirmaCraft server a second world with its own ores, creatures and rewards.
Who it’s for: Players who already use TerraFirmaCraft and want a demanding second dimension, and server owners who host TerraFirmaCraft packs and need the mod on every client.
How it compares
MineCollapse is a Forge and NeoForge mod that runs on client and server, under a custom license; it is not open source. TFC Eratosthenes is open source under the GNU General Public License v3.0 or later and is server required with an optional client. More Lava TFC is MIT licensed, not open source, and also needs both sides.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Beneath | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-08-22 |
| MineCollapse | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2025-07-14 |
| TFC Eratosthenes | Forge and NeoForge | 1.20.1 – 1.21.1 | Server required, client optional | 2026-08-14 |
| More Lava TFC | Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2025-11-29 |
Questions
Does Beneath need TerraFirmaCraft?
Must the server and players both install Beneath?
Which game versions does Beneath support?
In the catalog
Beneath is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 32,366 mods support Minecraft 1.21.1.
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What the author says
For years, the tranquility of the overworld was all you knew. It was difficult, yes, but the sun came out; the birds chirped in the morning; and there was not a bit of magic. One day, you decided that this was not enough. You dreamed of a cursed world, with strange creatures, danger beyond imagination, and…
Official listing
- Modrinth page
- modrinth.com/mod/beneath
- Owner
- eerussianguy
- Published
- 2024-10-03
- Updated on Modrinth
- 2026-08-22
- Facts verified
- 2026-10-15