Screenshots
Unknown Rules
风山渐 · Published by 非想天
6 user reviews — 17% positive (6 reviews) · 2 achievements
Last updated 28 Sept 2026
Unknown Rules is an independently created multiplayer online horror game that supports 1-4 players.
£8.12
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Price history
Action, Indie, Early Access · 2024 · More £5 - £15 games
Step into the unknown as you and your friends navigate the tense hallways of Unknown Rules, an independently developed early access horror game from Wind Mountain. Experience the thrill of teamwork in this action-packed multiplayer experience set for release in 2024.
About this game
Note: Text translation within the game has not been implemented yet. If you have requirements for text translation, please wait for the official version!
Game Introduction
Unknown Rules is an independently developed first-person horror puzzle game.
Frontroom (Pre-Backroom) Introduction
Every region has its "chosen unlucky ones"—ordinary people who, through sheer coincidence, fall into the Backroom. Before their descent, however, they were simply diligent workers in their respective Frontrooms. You can choose to work alone or team up with friends to complete your tasks. Perhaps, during your routine, an unexpected journey awaits.
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Note: Only one Frontroom level can be selected. All Frontroom levels lead to Backroom Level 0.
Level 1: Office
You are an ordinary office worker. On this day, the office is eerily empty. After working overtime, you decide to rest your head on the desk for a nap. When you awaken, the environment has shifted into something unrecognizable.
Level 2: Logistics Warehouse
You are a night-shift warehouse packer. As usual, you retrieve, package, and ship orders. But upon completing your quota, you discover an unsettling note.
Backroom Introduction
Congratulations—you’ve been chosen. Due to the scale of certain levels, please review the level descriptions before proceeding.
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Currently Developed Backroom Levels
(Descriptive reference order only; not actual gameplay sequence)
Note: Backroom levels are unlocked progressively and cannot be freely selected.
Level 0: The Darkroom
Procedurally generated terrain using PCG technology. Requires real-time lighting (RTX 2060 or higher recommended). A fixed-map version for lower-end GPUs will be added later.
Level 37: Sublimity
A serene "poolcore" environment optimized for multiplayer fun. Currently uses Lumen soft ray tracing.
Level 9: Suburbs
A windswept, sinister suburban nightmare.
Level 1: Abandoned Public Zone
Level 6: Lights Off
Technical note: Current scanning relies on ray tracing (RTX 2060+ required). A low-end GPU alternative will use basic particle scanning (less precise, ignores moving objects, no object data—scenery only).
Some Key Items
To survive, manage and use every item you find. Your inventory includes 8 backpack slots and 2 pocket slots.
Energy Drink: Temporarily boosts stamina.
Sanity Pills: Stabilizes your mental state.
Batteries: Restores power to electronic devices.
Mysterious Notes: Provide clues to solve puzzles.
Core Mechanics
Stamina: Limited endurance—critical during escapes.
Sanity: Fear gnaws at your mind when encountering the supernatural.
Health: Survivable injuries unless facing overwhelmingly powerful entities.
Party Mode
Boredom is inevitable, so I’m developing open-ended features to keep players engaged. Two experimental party maps are now available:
Level 1: Go Parlor
For Go enthusiasts: Challenge a friend to a match while listening to music. Note: This mode is unpolished due to limited development time, but it supports full Go matches.
Level 2: Cinema
Input a video URL (.MP4, .m3u8, or untested rtmp/rtsp streams) to watch together. Basic playback is functional, though features are incomplete. Contact the developer for issues.
In Development
New Backroom Level: Level 94 "Animation"
New Frontroom Level: Amusement Park
System Requirements
Will my PC run this? →Minimum
- OS *: Windows 7 64-bit or higher
- Processor: Intel Core i5-2300 2.8 GHz / AMD FX-6300, 3.5 GHz
- Memory: 8 GB RAM
- Graphics: Nvidia GeForce GTX 760, (2 GB VRAM) | AMD Radeon HD 7870, (2 GB VRAM)
- DirectX: Version 12
- Network: Broadband Internet connection
- Storage: 20 GB available space
- Sound Card: DirectX Compatible
Supported Languages
Latest news
Patch NotesOfficial
09-15 Updates
Fixed the bug where the warehouse storage room door would still trigger the chain sound even when the handle was not pulled down. Fixed the bug where the order printer would incorrectly highlight when no order was being printed. Fixed the pathfinding bug for monsters in the warehouse. Fixed the issue where the English localization of the warehouse hint text exceeded the length limit. Fixed the bug where the USB drive in the office client and the classroom key in the school client were generated incorrectly. Fixed the bug where the camera would become blurry when entering a match on the chessboard map. Fixed the issue of props clipping through objects on the school map. Fixed the bug where character selection became ineffective after selection. Fixed the bug where the school monster would stop functioning after killing a player. Fixed the bug where the chase sound effect would continue playing after a player was killed on the school map. Fixed the bug where client voice chat could not be heard.Read full article on Community Announcements (風山渐)Patch NotesOfficial
09-08Updates
Fixed the bug where the office monster was not patrolling. Fixed the issue where the office intro cutscene could not be skipped due to missing input. Fixed the bug where the office intro cutscene video was not displaying. Fixed the bug where the safe could be opened directly. Fixed the incorrect recovery of the clay pot after being broken. Fixed the issue where some drawers were overlapping. Fixed the abnormal prompt text in the classroom door. Fixed the issue where some meshes in the scene had no collision. Fixed the monster's collision issue. Fixed the bug where the sound-activated light could not detect the monster passing by. Fixed the issue where the vending machine still triggered sound effects after a failed purchase. Fixed the bug where the monster could be contained. Fixed the abnormal navigation mesh bug in the front hall school level. Optimized the item spawning logic in the office.Read full article on Community Announcements (風山渐)AnnouncementsOfficial
8.28 NewLevel-School is now open for trial
Fix:Optimized runtime memory usageOptimized the performance usage of the item UI \Optimized the PCG generation logicFixed the movement issue with monster AIAdded:The new tier \ has now been launched. It is an early preview version with a completion rate of approximately 75%The new entity \ can destroy closed doors in the sceneRead full article on Community Announcements (風山渐)AnnouncementsOfficial
08-21Updates
Fixes:Fixed an issue where the user voice chat UI displayed incorrect player names after death.Fixed a collision bug that prevented entering the warehouse basement.Fixed a bug where the warehouse pickup code occasionally could not be opened.Reduced the patrol frequency of dangerous monsters in the warehouse.Adjusted camera post-processing effects.Lowered the overall difficulty of the warehouse.Additions:The quick radial menu can now switch between different modes using the mouse scroll wheel.Added the option to purchase additional power in the warehouse.Added a chain switch in the warehouse management room that needs to be manually turned on.Adjusted the warehouse opening cutscene.Added a toggle for motion blur in the settings.Added a game startup splash screen.Added adjustable microphone scream sensitivity and threshold.Read full article on Community Announcements (風山渐)Patch NotesOfficial
7-31Updates
Update Fixes for the New Map: WarehouseFixed an issue where phone audio playback would interrupt.Fixed an issue where package delivery speed was abnormal after purchasing items.Fixed an abnormal binding issue when switching items during cargo transport.Fixed an issue where monsters would aggro onto dead players.Fixed an issue where items such as Death Boxes would affect navigation meshes.New ContentDifficulty Adjustment SettingsDue to the current high difficulty of the Office level, difficulty tiers have been implemented. By default, Easy mode will feature more items, reduced monster debuffs, and lower frequency of special mechanics. Please choose a suitable difficulty to play.Read full article on Community Announcements (風山渐)
