SSTR for Pc & Linux - Free Download (2025)

SSTR Screenshots

How to Install SSTR on Windows Pc

Click on the SSTR download button below.
Choose "Install" to install the game on the windows steam client.
Follow the on-screen prompts
Let it download the Full Version.
Once a game is downloaded, use the Windows Steam Client to play the game.

=== Download Game ====

Download for pc →

Guide: Installing SSTR on Linux with Steam Proton

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.

System Requirements

Windows Pc Requirements

Minimum:

Requires a 64-bit processor and operating system
OS: Windows 10
Memory: 4 GB RAM
Graphics: GeForce 980 or equivalent
Storage: 1 GB available space

Recommended:

Requires a 64-bit processor and operating system
OS: Windows 10
Memory: 16 GB RAM
Graphics: Geforce 1080
Storage: 1 GB available space

Linux Requirements

Minimum:

Requires a 64-bit processor and operating system

Recommended:

Requires a 64-bit processor and operating system

Mac Requirements

Minimum:

Requires a 64-bit processor and operating system

Recommended:

Requires a 64-bit processor and operating system

What is SSTR? Features and Description

SSTR is an escape-room style puzzle game set aboard Horizon, a colony ship adrift in the darkness under the watchful eye of Sister. Awaken into madness and explore the horrors of Horizon’s past.

SSTR is a single player escape-room style puzzle game set aboard Horizon. A colony ship adrift in the darkness of space, under the watchful eye of Sister. Awaken into madness and explore the horrors of Horizon’s past.

Sister, the AI entrusted with the safety of the souls aboard has gone rogue. She is hunting down the colonists and crew trapped onboard. Horizon is in lockdown and only the manual override keys will unlock the doors to reach Sister’s command core.

It is up to you to stop her.

Awakened from cryosleep, you are alone in the bowels of a ship filled with the screams of your fellow colonists.

The crew were hunted down but managed to leave clues to assist any possible survivors. Messages carved into the walls and cyphers smeared on the floor in blood, the crazed ramblings of people driven mad by Sister or perhaps coded information to help you.

Brain melting puzzles.

As you move through the ship, you'll discover the doors were locked by a shipful of crazy people. Pour over the scrawlings on the walls, floors, and computer terminals to gather information. Piece together the insane logic in order to escape the room you're in and get one step closer to shutting SSTR down.

You can run, she will find you.

Defend yourself from the onslaught of Sister’s drones. Scavenge for resources throughout the ship to construct automated defense turrets and hold her back as you struggle through Horizon. Survival will not be easy.