6alphasix.jar
by Deltascapes
6alphasix is a Forge world generation mod that adds scary entities, dimensions and structures to Minecraft 1.20.1, and it needs Geckolib.
What it does
The mod adds many frightening entities and several dimensions to the world, along with structures placed during generation. Its terrain generation can produce giant caves and bedrock at unusual heights, and it is built to work alongside biome and terrain mods. A slow-burn start means few events happen at first, and certain events occur only once a condition is met.
6alphasix also changes some game behavior: certain entities can be killed by the mod, and it shows custom error popup screens when something goes wrong. Shader packs can change how the moon and sun look while it runs, and it supports varied world types such as amplified, large biomes and single biome worlds. Geckolib is required, and the mod needs its configuration set before it is used.
The mod is released under All rights reserved and is not open source. Files exist for 1.20.1 only, with 0.9.9 as the latest Forge file, published in the beta channel on 2026-06-30. A server running it needs every connecting player to have it too. It was first published on 2026-05-14 and last updated on 2026-06-30.
Key features
Frightening entities
Many scary entities are added to the world, each spawning under its own conditions.
Extra dimensions
The mod brings additional dimensions that players can travel to after meeting the setup conditions.
Giant caves and bedrock
Terrain generation produces giant caves and bedrock at unusual positions.
Slow-burn progression
Events start slowly, and some happen only once, when a certain condition is reached.
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
Who it’s for: Players who want a slow-burn horror experience, and server owners who run worlds with biome or terrain mods, can use 6alphasix after setting up its configuration.
How it compares
Z's Wildscape is also Forge for 1.20.1 with client and server environment, but it is released under All rights reserved. Biospherical Expansion is open source under the MIT License and covers 1.20.1 – 1.20.2 on Forge, with client and server environment. ERROR X is the only alternative that runs on the client alone, and it is All rights reserved for 1.20.1.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| 6alphasix.jar | Forge | 1.20.1 | Client and server | 2026-06-30 |
| Z's Wildscape | Forge | 1.20.1 | Client and server | 2024-06-22 |
| Biospherical Expansion | Forge | 1.20.1 – 1.20.2 | Client and server | 2024-03-25 |
| ERROR X | Forge | 1.20.1 | Client-side only | 2025-08-18 |
Questions
Does 6alphasix need Geckolib?
Does the server need the mod?
Which game version does 6alphasix support?
Why are some events not happening yet?
In the catalog
6alphasix.jar is one of 8,515 World generation mods on ModsFinder, and one of 5,058 World generation mods for Forge. 34,764 mods support Minecraft 1.20.1.
Similar mods
What the author says
6alphasix.jar is a mod that tries to add scary ambience, dimensions and entities to the game. 6alphasix is a slow burn mod BUT it does start with a few events that only happen once at a certain time.
Official listing
- Modrinth page
- modrinth.com/mod/6alphasix.jar
- Owner
- Deltascapes
- Published
- 2026-05-14
- Updated on Modrinth
- 2026-06-30
- Facts verified
- 2026-10-15