Lost in the backrooms
by Dev_
Lost in the backrooms is a NeoForge dimension mod for 1.21.8 that sends players into a horror space reached by noclipping out of reality.
What it does
The mod adds a new dimension built from entity blocks, reached by leaving the normal world through a noclip path. Sanity is tracked as a level that players manage with almond water, while a creature called the Backeria chases them through the space. It runs on client and server, so both sides need it. Only NeoForge 1.21.8 files are published, the 1.0.0 alpha build dated 2026-08-09.
Key features
Backrooms dimension
A new dimension made from entity blocks, entered by noclipping out of reality into the backrooms.
Sanity level
Players track a sanity level and restore it by drinking almond water, which keeps the horror mechanic in play.
Chasing Backeria
The Backeria hunts players through the backrooms, so time spent there carries a constant threat.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Questions
Does Lost in the backrooms need a server install?
In the catalog
Lost in the backrooms is one of 8,515 World generation mods on ModsFinder, and one of 4,175 World generation mods for NeoForge. 17,695 mods support Minecraft 1.21.8.
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What the author says
Horror mod about backrooms for minecraft.In this mod you can noclip out of reality and enter in backrooms, you must controll a sanity level, using almond water, also you can chased by a backeria. It first version of this mod please dont play in multiplayer (have too much bugs).If you find bug, type in comments if…
Official listing
- Modrinth page
- modrinth.com/mod/lost-in-the-backrooms
- Owner
- Dev_
- Published
- 2026-08-09
- Updated on Modrinth
- 2026-08-09
- Facts verified
- 2026-10-15