Left Forgotten
by JustMili
Left Forgotten is a dimension mod that replaces the area beneath bedrock with a dark, abandoned world reached by leaving the Overworld through its void.
What it does
Left Forgotten generates a dimension below the Overworld's bedrock layer, a shadowed place left untouched for years, with few remnants of player activity and little vegetation. The world is plain and quiet, and mobs are scarce, so it reads more as a horror setting than as an adventure or decoration pack. Entering and leaving the dimension works through the Overworld void, and the mod states that it is escapable: a player who dies or attempts to fly up to the bedrock ceiling is sent back to the spawnpoint with damage cancelled.
The dimension is built on Fabric API and Architectury API, both of which are required and must be installed on the client and the server. The server and every player need the mod installed. Files are published for Fabric, Forge and NeoForge across two game versions, 1.20.1 and 1.21.1, with 1.1.3 as the latest release, under All rights reserved. The project is not open source, though its source code and issue tracker are public.
Key features
Dimension below bedrock
The dimension is reached from the Overworld void, placing a dark, abandoned landscape beneath the bedrock layer.
Escape from the dimension
Dying or flying up to the bedrock ceiling returns the player to the spawnpoint with damage cancelled, so the player is never trapped.
Sparse world generation
The terrain has little vegetation and few mobs, giving the dimension its abandoned and shadowed character.
Brittle bedrock
The bedrock layer surrounding the dimension is easier to break than in the vanilla world, which gives players a quicker way in.
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 2
Incompatible 1
How it compares
Abandoned Structures (by berezka) is a Fabric, Forge and NeoForge mod with the client and server environment, covering 1.20.1 – 1.21.11 and under All rights reserved, so it places ruins in ordinary terrain rather than below bedrock. Lost Libraries runs on Fabric, Forge, NeoForge and Quilt across 1.20 – 1.21.4, and is needed on the server, with the client optional. Abandoned adds a server-side abandoned theme on four loaders, across 1.19 – 26.1.2 under All rights reserved.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Left Forgotten | Fabric, Forge and NeoForge | 1.20.1 – 1.21.1 | Client and server | 2026-07-01 |
| Abandoned Structures (by berezka) | Fabric, Forge and NeoForge | 1.20.1 – 1.21.11 | Client and server | 2025-12-12 |
| Lost Libraries | Fabric, Forge, NeoForge and Quilt | 1.20 – 1.21.4 | Server required, client optional | 2025-01-25 |
| Abandoned | Fabric, Forge, NeoForge and Quilt | 1.19 – 26.1.2 | Server required, client optional | 2026-04-19 |
Questions
Does Left Forgotten need to be on the server?
Which loaders does Left Forgotten support?
Can a player get stuck in the dimension?
Is Left Forgotten compatible with True End?
In the catalog
Left Forgotten is one of 8,515 World generation mods on ModsFinder, and one of 4,027 World generation mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from JustMili
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What the author says
*Based on a tweet by @SlimerSlimy and Minecraft Alpha 1.1.2_01 (the actual version, not the fangame) * It is dark and abandoned, untouched in years and shadowed by the overworld above with no mobs or anything alive other than some vegetation.
Official listing
- Modrinth page
- modrinth.com/mod/left-forgotten
- Owner
- JustMili
- Published
- 2026-02-25
- Updated on Modrinth
- 2026-07-01
- Facts verified
- 2026-10-15