Fight back against humanity's enemies in this spaceship simulator and tower defense adventure. Fly to alien planets, destroy their ships, and land to build fortified spaceports. Place defenses to create a secure zone, then hunker down as enemies attack. Join the fight as fleets clash in open space.
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Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We have a lot of plans for features and improvements that we might want to add, but the best source of ideas is real players like you. Tell us your thoughts, give us your suggestions, and help us get to a better game!”

Approximately how long will this game be in Early Access?

“6 months - 1 year.”

How is the full version planned to differ from the Early Access version?

“In the full version, we hope to have a longer campaign, greater mission variety, improved art, and a lot more fun things to do. We believe this game is a good foundation for lots of growth.”

What is the current state of the Early Access version?

“This is currently a feature-complete game, playable from start to finish! You can refer to the "About This" section for more information about the features already in the game. Everything described in that section has been fully implemented. During the Early Access period, we intend to fix bugs, improve the graphics where we can, and explore adding new features beyond what is already described on this page. Your feedback will be crucial in this process.”

Will the game be priced differently during and after Early Access?

“We plan to gradually raise the price as we ship new content and features.”

How are you planning on involving the Community in your development process?

“We will read every single message on all platforms and add all suggestions to our list of potential improvements. You can be sure that whether we implement your ideas or not, they would have been fully considered. The most direct way to contact us would be through our email address, but you can also send messages through the Nightsail Game Studios pages on Reddit, Facebook and Instagram.”
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This game is not yet available on Steam

Planned Release Date: 2025

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Current Development Status

We are excited to share that Fortified Space entered closed beta on June 8, 2025!  We have been getting a lot of great input from players and look forward to sharing the game with all of you soon.  Our plan is to release a free demo in August.  Wishlist today and stay tuned!

About This Game

It has been two decades since the enemy first swept into the Solar System and attacked Earth. Humanity's forces put up a desperate fight for survival and, at great cost, slowed the enemy advance to a stalemate. Now, the heaviest fighting rages on continuously at the edges of the Solar System, far from the inner planets where a semblance of peace has returned.

It is against this backdrop that Earth intelligence discovered the locations of the enemy's homeworld and other planets within its wide-ranging domain. Hoping to force an enemy withdrawal and relieve pressure from Earth's defensive forces, the military formed a naval strike group to launch a surprise attack directly into their territory.

As captain of a Unified Earth Forces starship, you are thrust into the heart of the counter-offensive, leading daring missions deep into enemy territory. Your objective is to spearhead the assault, establish vital footholds, and pave the way for our Marine landing forces.  Fly your ship to hostile planets, engage in thrilling ship-to-ship combat, and land on the surface to build fortified spaceports. Place a variety of emplacements to secure the area against waves of enemies. Of course, you can always use your trusty assault rifle in a pinch.

Build and Defend Planetary Fortifications

Think strategically as you deploy barriers, turrets, gates, and barbed wire on the planet to safeguard the area against relentless waves of enemies.  Or, if it's been a long day, maybe you can just build a wall of turrets.  The enemy will get the message.  Create a secure zone to allow our Marines to land safely.

Experience Intense Space Battles

Test your skills as a starship captain as you evade hostile fire, strafe alien space stations, and escort ships during fleet battles.  Blast incoming missiles with your ship's point-defense turret and strike hard with your railguns.  Dominate the fight and secure victory.

Relax and Enjoy Down Time

Fortified Space offers more than just adrenaline-pumping combat.  Take a break from the battlefield to walk around your ship, talk to your crew, and read the news articles that update after each mission.  Gather materials through asteroid mining, hydroponic farming, and composting.  You can even kick around a soccer ball or play a target-shooting arcade game.  

Ready for shore leave?  Fly to Earth and explore the civic and cultural institutions in of humanity's capital.  Don't forget to visit the Library of Earth to read about the Interplanetary War and other interesting topics.

Good hunting!

Nightsail Game Studios

Special Thanks To:

Richard Wei, MVP (Most Valuable Playtester)

System Requirements

    Minimum:
    • OS: Windows 10
    • Processor: AMD Ryzen 7 4700U
    • Memory: 6 GB RAM
    • Graphics: AMD Radeon
    • DirectX: Version 12
    • Storage: 1 GB available space
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