The alpha.jar

The alpha.jar

adds another world and entity to your world!.

by
2.7K Downloads
forgeneoforgeadventuregame-mechanicsmobs
Rent Server with this Mod

Screenshots

The alpha.jar Screenshot 1
The alpha.jar Screenshot 2
The alpha.jar Screenshot 3
The alpha.jar Screenshot 4
The alpha.jar Screenshot 5

About this Mod

  • KNOW AS SIXALPHASIX

Core Gameplay Additions

  • Scary entities that simulate world infection
  • Multiple unsettling dimensions
  • Random horror-style world events
  • Custom music and audio effects
  • Visual overlays and screen effects

Dimensions

  • Adds many custom dimensions with maze, liminal, void, and distorted themes

Examples include:

  • Limbo, Liminality, Mazes, Abyss
    Suburbs, Flatland, Endless, Dream
    No_Escape, Demise Maze, Aftermath
  • Some dimensions are entered using chat commands:
    err.level1 → err.level5
  • one last dimension
  • Type Return to go back to the overworld

Random Events System

  • Unexpected structures appearing
  • Strange chat messages and fake system messages
  • Fake join/leave notifications with your username
  • Entities briefly staring at the player
  • Lightning strikes and void chunk effects
  • Screen rotation and overlay effects
  • Music disc drops and custom sounds
  • Infection-style event triggers

Entities

  • Infected and watcher-type creatures

  • Disguise mobs with fake appearances

  • Void and anomaly entities

  • Stalker-style mobs

  • Floating and orb-shooting entities

  • Error-themed and glitch-themed mobs

  • Configuration Options

  • Toggle fast events

  • Toggle screen overlays

  • Enable or disable warnings

  • Adjust event behavior using config menu

Compatibility Notes

  • Do not combine with heavy biome mods (example: large biome expansion mods)
  • May cause excessive mob spawning if combined with biome overhauls

Additional Notes

  • Focused on atmosphere, not traditional progression
  • Not centered only on dimensions, but also on events and anomalies
  • Custom songs are included

Available Versions

The alpha.jar 1.5.3release
MC 1.20.1, 1.21.1, 1.21.2, 1.21.3, 1.21.4, 1.21.5, 1.21.6, 1.21.7, 1.21.8, 1.21.9, 1.21.10, 1.21.11forge, neoforge
March 10, 2026

How to Install The alpha.jar on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.21.11).

3

Install Mod

Open the mod browser in the dashboard and search for "The alpha.jar". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forgeneoforge

Minecraft Versions

1.21.11, 1.21.10, 1.21.9 (+10 more)

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

The alpha.jar server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.11). You can switch loaders with one click in the panel.

Is The alpha.jar compatible with forge and neoforge?

The alpha.jar officially supports forge, neoforge for Minecraft 1.21.11, 1.21.10, 1.21.9. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with The alpha.jar – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if The alpha.jar consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.

Rent Modded Server

Install The alpha.jar with just one click on your server.

Recommended RAM
4 GBab €8/mo
Min. 3 GB | +1 GB pro 8 Spieler
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1-Click Mod Install
NVMe SSD Storage
DDoS Protection included

Details

License
MIT License
Server-side
Required

Supported Versions

1.21.111.21.101.21.91.21.81.21.71.21.61.21.51.21.41.21.31.21.2+3 more