ProtoGalaxy screenshot 1
ProtoGalaxy Trailer
Proto Defense Trailer
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Games Like ProtoGalaxy

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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.

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About ProtoGalaxy

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

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

Key features

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Team up to defend Earth from alien invaders.
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Pick from a big selection of turrets.
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Reposition your turrets at any time to deal extra damage.
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Take down huge bosses.
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Compete in leaderboards for the highest score.
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Tackle 8 new challenging achievements.
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Built using the ProtoGalaxy Editor.M

Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.

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