Backrooms Mod

Backrooms Mod

This mod adds new structures and stuff into your game.

by
195 Downloads
neoforgeadventurecursed
Rent Server with this Mod

Screenshots

Trap Room
One Of The Backrooms Rooms
Some Blocks This Mod Adds

About this Mod

iminal Structures – Level 0 in the End (NeoForge 1.21.1)

Liminal Structures brings Level 0 of the Backrooms into Minecraft — not as a new dimension, but as a quiet corruption of The End itself.

Across the End, you’ll find 19 handcrafted, standalone Level 0 rooms, generated as isolated structures. No entities. No chase mechanics. No scripted horror.

Just fluorescent lights. Yellow wallpaper. Endless carpet.

🌫️ Concept

Level 0 appears naturally in the End as rare, structure-based anomalies. Each room is:

Randomly generated

Fully solid

Exploration-focused

Atmosphere-driven

They do not connect — every structure stands alone.

🧱 Blocks & Features

Custom blocks recreate the classic Backrooms aesthetic:

Wallpaper, ceiling tiles, fluorescent lights

Carpet (with slabs and stairs)

Vents and signage

Error blocks (visual anomalies)

Darkness & Darkness Core

Biohazard blocks and fluid (apply Wither)

Functional computer block

Items include:

Almond Water (rare consumable)

Flashlight (real light, subtle flicker)

🎮 Focus

This mod is built for:

Exploration

Liminal atmosphere

Minimalist horror

No new dimension.
No sanity system.
No entities.

Just Level 0, where it doesn’t belong.

Technical

Minecraft 1.21.1

NeoForge

Structure-based worldgen

Multiplayer compatible

Liminal Structures doesn’t try to be loud.

It simply places Level 0 in the End —
and lets you stand in it.

Available Versions

Backrooms Mod 1.0.0release
MC 1.21.1neoforge
February 21, 2026

How to Install Backrooms Mod 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 (1.21.1).

3

Install Mod

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

Compatibility

Mod Loaders

neoforge

Minecraft Versions

1.21.1

Server-side

Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Backrooms Mod 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 (1.21.1). You can switch loaders with one click in the panel.

Is Backrooms Mod compatible with neoforge?

Backrooms Mod officially supports neoforge for Minecraft 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Backrooms Mod – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Backrooms Mod 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 Backrooms Mod 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
MIT License
Server-side
Required

Supported Versions

1.21.1