ProtoGalaxy for Pc & Linux - Free Download (2025)

ProtoGalaxy Screenshots

How to Install ProtoGalaxy on Windows Pc

Click on the ProtoGalaxy 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 ProtoGalaxy 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

OS: Windows XP SP3/Vista/7
Processor: 2GHz or equivalent processor
Memory: 1GB
Graphics: 256MB video ram or better (GeForce 7 series or higher/Radeon X600 series or higher)
DirectX®: 9.0c
Hard Drive: 1GB
Sound: Windows compatible sound card

No maximum requirements!!

Linux Requirements

No minimum requirements!!
No maximum requirements!!

Mac Requirements

No minimum requirements!!
No maximum requirements!!

What is ProtoGalaxy? Features and Description

Earth is under siege! A mysterious and powerful alien race has come to enslave the entire galaxy, and your fleet is humanity's last hope. You must put an end to the attacks and rebuild a home for the survivors.

Earth is under siege!
A mysterious and powerful alien race has come to enslave the entire galaxy, and your fleet is humanity's last hope. You must put an end to the attacks and rebuild a home for the survivors. With the invaders in hot pursuit, and the dangers of the unexplored at every turn, do you have what it takes to forge a new galaxy?

Key features:

Team up with up to 4 players and explore the galaxy.
Enjoy challenging action, smart puzzles, and deep adventure.
Customize your ship with a huge selection of parts.
Use physics to solve puzzles or defeat your enemies.
Create your own galaxy using the built in editor.
Download new galaxies from other players for endless gameplay.

Proto Defense DLC

Source Studio is pleased to announce it's first Arcade map: Proto Defense!
Proto Defense is the first online multiplayer co-op turret defense game for ProtoGalaxy. Team up with your friends to defend Earth from alien invaders in this unique turret defense experience.