In this mod you'll be playing as a detective. You was assigned to invistigate abnormal tectonic activities but eventually found something unfathomable - giant illegal residential complex "OneRooms".
There you will encounter OneRoomer, Histor and more interesting entities.
OneRoomer - friendly near his shop, becomes more aggressive the deaper you explore and the more you disrupting the order of OneRooms.
Histor - friendly until you hit him, then...
SpoilerSwarz - very dangerous
SpoilerHiking - try to find him
SpoilerResident - self explanatory
Most interesting mechanics include:
- Procedural generation
- 100+ room layouts
- 10+ variants of behavior for OneRoomer
- Evidence collector
- Trading with OneRoomer (use odish near shop)
- Echolocation ability for OneRoomer
- 5 dimensions
- Cool weapon
- Works in multiplayer (use setplayers)
Geckolib IS REQUIRED
P.S. for best expirience play vanila + OneRooms with just optifine (Sodium may cause bugs)
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as onerooms_jar-1.0.0-forge-1.20.1.jar — drop this file into the mods folder
- Download size: 12.5 MB
- Download link checked 21 Aug 2026 — working
These come from our own check of the pack file, not from the source page.