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Subject Zero
You are a scientist turned into test subject zero, forced to fight the infection by venturing through your own nightmares. Will you survive.

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Features
Single-player
Steam Achievements
Family Sharing
Steam is learning about this game 
Languages:
Interface Full Audio Subtitles
English ✔ ✔ ✔

Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We chose Early Access so we can receive player feedback and improve our game as much as possible.”

Approximately how long will this game be in Early Access?

“We expect around 5 months of Early Access.”

How is the full version planned to differ from the Early Access version?

“We plan to add a second chapter to the game, expand the content, and integrate player suggestions.”

What is the current state of the Early Access version?

“Right now, the Early Access build includes one fully playable chapter out of the two planned. The second chapter is currently in development and will be released in future updates, along with additional content and improvements based on community feedback.”

Will the game be priced differently during and after Early Access?

“Yes, we plan to increase the price once Early Access is finished.”

How are you planning on involving the Community in your development process?

“We will involve the community through the feedback we receive, mainly by implementing player suggestions.”
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This game is not yet available on Steam

Planned Release Date: Oct 21, 2026

This game plans to unlock in approximately 2 weeks

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About This Game

SUBJECT ZERO

Subject Zero is a first-person psychological horror game combining hallucinations, virus, mutations, exploration, puzzles, and chases.

You wake up inside a mysterious laboratory after a leak involving XPT-120, an experimental virus capable of causing powerful hallucinations and mutations.

Your goal is simple: survive and find a way out.

But the further you go, the more your perception of reality begins to deteriorate.

EXPLORE A WORLD THAT CHANGES 

Explore a secret laboratory, abandoned facilities, Backrooms, labyrinths, a strange hotel, and environments directly connected to the character's hallucinations and memories.

Each area offers a different atmosphere and situation: exploration, puzzles, chases, observation, or survival.

DON'T TRUST WHAT DO YOU SEE

XPT-120 gradually distorts your perception.

Rooms can change, environments can transform, and some apparitions may become impossible to distinguish from reality.

You will sometimes have to understand your surroundings in order to progress, while avoiding the creatures hunting you.

FEATURES

  • First-person psychological horror

  • Hallucinations and distorted reality

  • Experimental virus and mutations

  • Exploration and environmental puzzles

  • Labyrinths and liminal spaces

  • Backrooms

  • Creatures and chase sequences

  • Immersive sound design and environments

  • Story revealed through the environment and various clues

  • Multiple unique environments and situations

Add Subject Zero to your wishlist and prepare to discover the truth.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

This game includes AI‑generated voice acting. All content has been reviewed and approved by the developer.

System Requirements

    Minimum:
    • OS: Windows 10 64-bit
    • Processor: Intel Core i5-4460 / AMD Ryzen 3 1200
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GTX 960 / AMD Radeon R7 370 (ou équivalent)
    • DirectX: Version 11
    • Storage: 10 GB available space
    • Sound Card: Compatible DirectX
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