The Complex

The Complex

"And the more times it remembers something, the less it does."

by
92 Downloads
neoforgecurseddecoration
Rent Server with this Mod

Screenshots

Room
Mysterious Yellow Nugget Walks By😱

About this Mod

Do you want to prank your friends by putting them into liminal purgatory?
This is the mod for you!

This mod adds various Backrooms-themed blocks for you to build your own winding disconjoined maze of fluorescent lights and ugly carpet. Or... you could use them for your house. We don't judge here.

Where the hell am I?

I found something.

Okay.
What did you find?

Found a place.

It's massive in there.

And it just goes on and on and on.

All these rooms.

This place builds them.

Actually, more like it... remembers them.

And the more times it remembers something, the less it does.

Available Versions

The Complex 1.1.3release
MC 1.21.8neoforge
May 31, 2026
The Complex 1.1.2release
MC 1.21.4neoforge
February 28, 2026
The Complex 1.1.1release
MC 1.21.4neoforge
November 4, 2025
The Complex 1.1.0release
MC 1.21.4neoforge
October 28, 2025
The Complex 1.0.0release
MC 1.21.4neoforge
September 20, 2025

How to Install The Complex on Your Server

1

Order Server

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

2

Set neoforge Loader

In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.8).

3

Install Mod

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

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.8, 1.21.4

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

The Complex server crashes on startup – what to do?

Most common cause: wrong neoforge 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 (1.21.8). You can switch loaders with one click in the panel.

Is The Complex compatible with neoforge?

The Complex officially supports neoforge for Minecraft 1.21.8, 1.21.4. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with The Complex – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if The Complex 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 Complex with just one click on your server.

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

Details

License
Creative Commons Zero v1.0 Universal
Server-side
Required

Supported Versions

1.21.81.21.4