Noclip out of reality and into a wrong, humming place that does not connect the way it should.

The Backrooms adds an early experimental liminal dimension to Vintage Story. Players can fall through weak points in reality or enter through special portals, arriving in an endless yellow maze of rooms, corridors, buzzing lights, and unstable connections.

Special Notice

I hate that I even have to make this abundantly clear, but there has been an accusation thrown around, so let me put this to bed here and now.

• I used AI in a singular project to help flesh out a plan.md file to help me avoid Feature Creep. In my 20+ years of programming, including web design and front end/backend development, its the one thing that has killed more of my projects than anything else.
• No, I do not use AI in any of my coding projects in any way that ever becomes public facing. The code you get from me is authored by my hands alone. I'd rather do it by hand than spend 2-3 hours fixing things I could have done myself in an hour or less.
• That will never change as I have a very strong stance on taking the lazy way out in everything I do.

Early Access Warning

This is an early access test build. The core idea is playable, but the mod is still under active development and uses experimental dimension generation, portal travel, and persistent chunk connectivity. Back up your world before testing.

Do not remove this mod or Manifold while players are inside the Backrooms. Players may become stranded, and saves with active custom dimension state may behave unpredictably if required mods are removed mid-run.

How it works

Noclip Events

Players with low temporal stability may occasionally fall through reality while grounded. Known weak spots become more likely to trigger again, and the Backrooms records where those weak spots lead.

Level 0

The current release contains Level 0: a persistent, streaming dimension made from yellow rooms, tight partitions, doorway-sized passages, fluorescent ceiling lights, and unstable chunk-to-chunk connections.

Escaping

When a player enters by noclipping, the mod attempts to place an exit portal near their landing area. The exit may not be immediately obvious, but it should be nearby. Future versions will make escape routes more atmospheric and less purely mechanical.

Unstable Connectivity

The Backrooms does not behave like a normal place. Chunk boundaries are tracked as connections that can remain stable, become unstable, or break. Frequently traveled paths resist decay, while neglected routes may close off over time.

Server Admin Notes

• Back up saves before testing.
• Do not disable this mod or Manifold while players are inside the Backrooms.
• This build is intended for testing worldgen, portal travel, lighting, and dimension persistence.
• If a world becomes unstable during testing, try reproducing in a fresh test world and report what happened.

Implemented Features

• Persistent Backrooms Level 0 dimension
• Temporal stability based noclip events
• Weak spot persistence and repeat-trigger behavior
• Exit portals for noclip victims
• Room-based procedural Level 0 generation
• Chunk connectivity drift: stable, unstable, and broken routes
• Admin test commands: /backrooms and /exitbackrooms

Planned Future Content

• Ruin structures with deliberate Backrooms entry portals
• Client-side disorientation effects, audio polish, and atmosphere
• Fear or sanity mechanics
• Backrooms entities
• Craftable unstable door entry path
• Config options for noclip chance, thresholds, and worldgen behavior
• Additional Backrooms levels beyond Level 0

Current Status early access

This mod is currently a test release for broader feedback. The core dimension, noclip entry, exit portals, and Level 0 generation are implemented, but balance, stability, content density, and atmosphere are still being developed. Bug reports and server feedback are welcome.

Contributors

• LilianaXolkiyr: Mod Author and Lead Dev
• audrae: Mod Author of Pepper's Clutter and Decor