How to Download Injection No.9 - Prologue

1. Click on the Injection No.9 - Prologue download button below.
2. Choose "Install" to install the game on the windows steam client.
3. Follow the on-screen prompts
4. Let it download the Full Version.
5. Once a game is downloaded, use the Windows Steam Client to play the game.

=== Download Game ====

Download for pc →

This guide describes how to use Steam Proton to play and run Windows games on your Linux computer. Some games may not work or may break because Steam Proton is still at a very early stage.

1. Activating Steam Proton for Linux:
Proton is integrated into the Steam Client with "Steam Play." To activate proton, go into your steam client and click on Steam in the upper right corner. Then click on settings to open a new window. From here, click on the Steam Play button at the bottom of the panel. Click "Enable Steam Play for Supported Titles."

Alternatively: Go to Steam > Settings > Steam Play and turn on the "Enable Steam Play for Supported Titles" option.

Valve has tested and fixed some Steam titles and you will now be able to play most of them. However, if you want to go further and play titles that even Valve hasn't tested, toggle the "Enable Steam Play for all titles" option.

2. Choose a version
You should use the Steam Proton version recommended by Steam: 3.7-8. This is the most stable version of Steam Proton at the moment.

3. Restart your Steam
After you have successfully activated Steam Proton, click "OK" and Steam will ask you to restart it for the changes to take effect. Restart it. Your computer will now play all of steam's whitelisted games seamlessly.

4. Launch Stardew Valley on Linux:
Before you can use Steam Proton, you must first download the Stardew Valley Windows game from Steam. When you download Stardew Valley for the first time, you will notice that the download size is slightly larger than the size of the game.
This happens because Steam will download your chosen Steam Proton version with this game as well. After the download is complete, simply click the "Play" button.

Windows Pc Requirements

Minimum:

• OS: 10
  
• Processor: Intel Core I3-9100F 3.6 GHz
  
• Memory: 8 GB RAM
  
• Graphics: Nvidia GeForce GTX 1660 TI
  
• DirectX: Version 10
  
• Storage: 9 GB available space

Recommended:

• OS: 10
  
• Processor: Intel Core i5-12600 ~3.3GHz
  
• Memory: 8 GB RAM
  
• Graphics: Nvidia GeForce RTX 3070
  
• DirectX: Version 10
  
• Storage: 9 GB available space

Linux Requirements

No minimum requirements!!
No maximum requirements!!

Mac Requirements

No minimum requirements!!
No maximum requirements!!

Injection No.9 - Prologue is the first standalone episode of a psychological horror series. Investigate a decaying asylum after an anonymous tip, with only brief messages guiding you as reality breaks apart.

Injection No.9 - Prologue is the first episode in a psychological horror series.

WARNING: This video game may potentially trigger seizures for people with photosensitive epilepsy. Player discretion is advised.

Important Note: This is the complete and fully playable first episode of a longer story-driven game series that will come. All gameplay systems and mechanics are fully implemented – this is not a demo or a limited preview.

Storyline

You are a detective haunted by shadows of the past.
An anonymous tip leads you to a long-abandoned asylum on the outskirts of the city. The building is crumbling, but something inside is very much alive. As you step inside, reality begins to twist. Doors vanish. Whispers echo from the walls. Your only link to the outside world is a dispatcher on the phone—someone who seems to know more than they should.

Environment

The story unfolds within the decaying walls of an abandoned asylum, long forgotten by time. In this episode, players will explore only the men's wing, located on the left side of the facility.

Creaking floorboards, rusted doors, and faint whispers from the past shape an eerie, oppressive atmosphere. Each room tells a piece of the asylum's dark history, blending psychological tension with environmental storytelling.

Expect narrow corridors, flickering lights, and a constant sense of unease as you uncover what really happened behind those locked doors

 Gameplay

• Immersive Exploration – Navigate the dark, decaying men’s wing of an abandoned asylum in a slow-paced, atmospheric experience focused on tension and discovery.

  

• Multi-Mode Flashlight – Use a standard beam to light your path, or switch to UV mode to reveal hidden messages, clues, and paranormal traces.

  

• Interactive Smartphone – Stay in constant contact with your dispatcher, send photos, receive updates, and access critical apps like the motion radar to detect nearby movement.

  

• AR Glasses with Night Vision – Take photos of key evidence and use night vision as a backup when your flashlight battery dies.

  

  

• Sanity System – Monitor your mental state through a wristwatch as the psychological weight of your surroundings begins to affect your perception.

• Environmental Storytelling – Every room tells a story; uncover what happened through visual cues, documents, and interactive objects.

• High-Tension Atmosphere – A focus on sound design, lighting, and isolation creates a deeply unsettling experience without relying on constant jump scares.

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