Screenshots
Watch trailer on Steam ↗CHWÆST: A Creeping Parasite Horror
Airem · Published by Airem · Official site ↗
Positive — 85% positive (46 reviews) · 20 achievements
Last updated 28 Sept 2026
A late-90s retro 3D horror where you feed the Biomass Core to escape. No keys. No doors.
£0.98
£1.79Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Action, Adventure, Indie · 2026 · More under £5 games
About this game
CHWÆST — Feed the Biomass Core to progress
A late-90s inspired retro 3D horror where progress is biological.
You don’t unlock doors. No keys — you feed the Biomass Core.
CHWÆST takes place inside a living organism. Passages overgrow, corridors tighten, and the environment reacts to your presence.
At the center lies the Biomass Core (the Core) — the only way forward.
Your goal: complete simple objectives, bring offerings back to the Core, and push deeper until you find a way out.
How progression works
The entire environment is a single organism that depends on the Biomass Core being fed.
When the Biomass Core is hungry — passages are blocked
When you feed it — the organism retracts and reveals new paths
Doors are replaced by tendrils. Keys are replaced by food for the Biomass Core.
The core gameplay loop
find → grab → return → feed the Core
objects hidden in darkness that must be carefully spotted
small creatures crawling along the floor
organisms that hide or escape when approached
In the game, you are given clear objectives such as:
Active outgrowth: Mushrooms → Feed the Core (Mushrooms 0/6)
FEED THE BIOMASS CORE — RETRACT OUTGROWTHS (0/5)
Every trip deeper into the tunnels becomes a decision: how far can you go before you must return to the Biomass Core?
One location. Constantly changing paths.
item placement changes each playthrough
you never fully know what you will encounter when you return to the Core
Visual style: how you remember it, not how it looked
low internal resolution scaled sharply
limited color depth and dithering
classic 50/50 transparency effects
subtle geometry artifacts that make the world feel unstable
This is not meant to be pretty. It is meant to feel unsettling and unsafe.
What to expect
a short, intense horror experience (30–60 minutes)
a unique mechanic centered around feeding the Biomass Core
exploration of dark, organic tunnels
minimalist rules and clear in-game objectives
If you enjoy horror that is mechanical, raw, and unpredictable — CHWÆST is exactly that.
System Requirements
Will my PC run this? →Minimum
- OS *: Windows 7 / 8 / 10, 32 bits or 64-bits
- Processor: Core i3 / AMD FX 2.4Ghz
- Memory: 4 GB RAM
- Graphics: GTX 1050 / Nvidia GTX 460 / AMD Radeon HD 5750 / Intel HD 630 / GTX 750
- Storage: 4 GB available space
- Additional Notes: But, please check always demo
Recommended
- OS *: Windows 7 / 8 / 10, 32 bits or 64-bits
- Processor: Core i5 / Ryzen 5
- Memory: 8 GB RAM
- Graphics: GTX 1080 / GTX 3060 Ti / Nvidia GTX 680 / AMD Radeon RX 580 / Intel Xe-HPG
- Storage: 4 GB available space
- Additional Notes: But, please check always demo
Supported Languages
Latest news
Patch NotesOfficial
Update 1.0.5 – Camera Shake Fix & Stability Improvements
Hello, Version 1.0.5 has been released for CHWÆST: A Creeping Parasite Horror. Both the Demo and the Full Version have been updated across all platforms (Windows 64-bit, Windows 32-bit, macOS 64-bit and Linux 64-bit). Changes: - Updated Windows (32/64-bit), Linux (64-bit) and macOS (64-bit) builds- Updated Demo and Full Version- Fixed camera shake effect that could be too strong on some systems- Gamepad improvements- Other minor fixes and stability improvements If you encounter any issues, please let me know — for example on the forum. Your feedback helps improve the game. ChangelogBugsRead full article on Community Announcements (Airem)Patch NotesOfficial
Update 1.0.4 – Platform, Localization & Stability Improvements
Hello, Version 1.0.4 has been released for CHWÆST: A Creeping Parasite Horror.Both the Demo and the Full Version have been updated across all platforms (Windows 64-bit, Windows 32-bit, macOS 64-bit and Linux 64-bit). Changes:- Updated Windows (32/64-bit), Linux (64-bit) and macOS (64-bit) builds- Updated Demo and Full Version- Notes fixes- Localization improvements for around 20 languages (including Korean, Japanese and others)- Gamepad improvements- Other minor fixes and stability improvements If you encounter any issues, please let me know — for example on the forum. Your feedback helps improve the game. ChangelogBugsRead full article on Community Announcements (Airem)Patch NotesOfficial
Update 1.0.3 – Demo & Stability Fixes
Hello, Version 1.0.3 has been released for CHWÆST: A Creeping Parasite Horror.Both the Demo and the Full Version have been updated across all platforms (Windows 64-bit, Windows 32-bit, macOS 64-bit and Linux 64-bit full version). Changes:- Updated Demo and Full Version builds- Font improvements for several languages (including Japanese, Chinese and Korean)- Small improvements to gamepad support- Fixed a bug where the player could fall from the ladder near the end of the game- Other stability improvements If you encounter any issues, please let me know — for example on the forum. Your feedback helps improve the game. ChangelogBugsRead full article on Community Announcements (Airem)Patch NotesOfficial
Minor Update – Fixes & Improvements
Hello, A small update has been released for CHWÆST: A Creeping Parasite Horror.This update includes minor fixes and improvements across all platforms (Windows 64-bit, Windows 32-bit, macOS 64-bit and Linux 64-bit full version).Changes:- Minor English localization fixes- Small improvements to gamepad support- Fixed a bug where the player could fall from the ladder near the end of the game- Other minor stability improvementsIf you encounter any issues, please let me know — for example on the forum. Your feedback helps improve the game. ChangelogBugsRead full article on Community Announcements (Airem)AnnouncementsOfficial
CHWÆST Demo Is Now Available
Hello,The demo for CHWÆST: A Creeping Parasite Horror is now live.It was slightly delayed because every demo needs to pass Valve’s review process. Thank you for your patience. How I Treat Demos The demo will remain available after release. In my projects, I treat a demo as a way to: test performance on your system see if the visual style and atmosphere work for you experience the core gameplay loop before buying At the same time, it’s important to understand that the full version of the game may continue to receive updates, while the demo usually does not. Over time, small differences between versions may appear. The demo is meant as a technical and gameplay preview — not a separately maintained live branch of the project. Thanks to the demo, you can test whether the game fits your expectations technically and stylistically. If you decide to purchase the full version, Steam also provides its standard refund system as an additional layer of buyer protection. Why Some Developers Remove Demos Keeping a demo available after launch isn’t always simple. In practice, the demo and the full game are often two separate builds. That can mean: double testing separate bug fixes additional support requests risk of version mismatch if update pipelines aren’t perfectly synchronized For that reason, some developers choose to remove demos at launch — usually for production and organizational reasons. Every project has different constraints and workflows. Current Demo Version This demo is based on the same build as the current full version (1.0.1). If you encounter any technical issues, feel free to report them on the forum. – Airem (solo developer)Read full article on Community Announcements (Airem)
