
Screenshots

Watch trailer on Steam ↗R.A.T.: Human Error – Episode One
CH3RZY · Published by CH3RZY
Positive — 93% positive (43 reviews)
Last updated 28 Sept 2026
The world ended. Now the real nightmare begins. Deep underground, a child wakes in a infected facility. Minds are breaking. Bodies are changing. Crawl through vents, follow echoes, and escape before it’s too late. Your mother is waiting.
Adventure, Indie, RPG, Free To Play · 2026 · More free games
Crawl through treacherous vents and follow eerie echoes in this 2026 indie adventure from CH3RZY. As a child trapped in an infected facility, your survival hinges on unraveling the mystery of your mother’s whereabouts.
About this game

The war ended in a blinding flash. Now, the earth is hollow, a fractured shell hiding the remnants of humanity. A new era of evolution is about to begin. Survivors fled underground, but salvation was a lie. A sickness spread, warping minds, twisting bodies. No one is being spared.
You are a child, taken to a hidden facility deep below the surface. You don’t know why. Only that you’re sick. That everyone is. And something is wrong.You have to escape. Crawl through the vents. Follow the echoes to get to the surface. Your mother is waiting for you.

Wander through a decaying underground facility where nothing feels stable. Every room hides secrets, every object whispers fragments of a story you were never meant to uncover.

The bunker is not empty. Strange figures linger in the shadows, some helpful, some deceptive, none entirely trustworthy. Their words may reveal truth… or bury it deeper.

A labyrinth of vents and passages twisting into the dark. Something moves inside, creatures that stalk and listen in the silence. Paths split, shift, and close behind you. There is no turning back.

Though your journey branches in countless directions, they all lead toward the same haunting revelation. What you find depends not just on where you go, but on what you dare to see.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 (64-bit)
- Processor: 2GHz
- Memory: 4 GB RAM
- DirectX: Version 11
- Storage: 1 GB available space
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
*languages with full audio support
Latest news
Patch NotesOfficial
BUG FIXES PATCH NOTE 1.1
Hello! This is my first time using the community posts, so let’s test it out!Bugs fixed:F12 restart bug removedCollider issuesClearer ending Dialogue fixes (some small errors)With the release of my very first game, I just want to say that I see and read your feedback, and I’m doing my best to fix the issues you’ve been running into. It’s honestly so fun (and a bit surreal) to see people playing RAT! Please don’t be afraid to speak your truth, good or bad. It really helps me learn and make the next updates and games better. Thank you for playing and supporting the project!Read full article on Community Announcements (CH3RZY)






