Oneiros for Pc & Linux - Free Download (2025)

Oneiros Screenshots

How to Install Oneiros on Windows Pc

Click on the Oneiros 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 Oneiros 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 8/7/Vista
Processor: Core 2 Duo E6700 (2.66 GHz)
Memory: 4 GB RAM
Graphics: nVidia GeForce 840M or Radeon R7 M260
DirectX: Version 9.0c
Storage: 2 GB available space

Recommended:

Requires a 64-bit processor and operating system
OS: Windows 10
Processor: Core 2 Quad Q9650 (3 GHz) or better
Memory: 8 GB RAM
Graphics: NVidia GTX 970 or better
DirectX: Version 11
Storage: 2 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 Oneiros? Features and Description

Will you be able to break the vicious circle ? Can you regain control ? Experience the surreal adventure filled with puzzles and psychedelic visions.

Liam wakes up late just like any other day, but something just feels different. Doors to his room are locked, laptop's hacked, phone's broken and something just doesn't feel right.
The place definitely looks like his room, but at the same time it doesn't feel like home anymore.
He just had a weirdest dream ever, feels like his head is about to explode and he doesn't remember what he did yesterday.
Find out what's going on and help Liam escape.

Summary

Oneiros is a first-person, surreal puzzle adventure game that combines escape-room, classic adventure and crafting/building mechanics into a single narrative-based, surreal experience filled with psychedelic visions.