Loading…
Seize control of hostile planets in this nostalgic space sim and tower defense hybrid inspired by classic Flash games. Fight for orbital supremacy in starship combat, then land on the surface to build bases, deploy defenses, and shred enemies. Relax aboard your ship with farming, mining, and more.
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Social Deduction Fest ends
Official stores with direct support.
Try this game before buying.
You are the captain of a Unified Earth Forces starship, leading daring combat missions deep into enemy territory. Fight in space and on the ground as you spearhead the assault, establish vital footholds, and pave the way for Marine landing forces. Engage in ship-to-ship combat, build bases on planet surfaces, and shred enemies with turrets and your assault rifle alike. Turn the tide in a war for humanity's survival.
Test your skills as a starship captain as you evade hostile fire, strafe alien cruisers, and escort allied 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.
Think strategically as you deploy barriers, turrets, gates, and barbed wire on hostile planets to safeguard 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. Each planet has unique characteristics, but the objective is almost always the same: create a secure zone to allow our Marines to land safely. After reinforcements arrive and you've succeeded in your mission, you can toggle Endless Mode to activate nonstop enemy attacks. Keep coming back to the planet to work on your base and fight off this relentless assault!
Fortified Space offers more than just adrenaline-pumping combat. Take a break from the fight to walk around your ship, talk to your crew, and read the news articles that update after each mission. Gather materials for your next mission 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 humanity's capital. Don't forget to visit the Library of Earth to read about the Interplanetary War, Unified Earth Forces ships, and other interesting topics. Earth will be an area for continued growth during Early Access.
Report to your ship and prepare for launch.
Good hunting!
Special thanks to Richard Wei, MVP (Most Valuable Playtester)
Nightsail Game Studios logo by Alexis Paneda and Gian Paneda
