183+ iOS apps & games curated and reviewed
Looking for free galaxy defense fortress apps and games? 19 of our 183+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.
Defend Earth from alien invaders in this idle tower defense game. Build diverse turrets, strategize your defense, and power up your character with unique skills and weapons. Collect resources and take on global challenges to protect the planet.
Pilot a lone spaceship to defend Earth from relentless alien swarms in this classic space shooter. Upgrade your weapons and skills to overcome increasingly difficult challenges across numerous levels and intense boss battles.
Engage in real-time strategy to defend your base against relentless enemy waves. Build, upgrade, and deploy a variety of units with precise timing to survive epic battles in space. Master strategic decisions to overcome increasingly difficult challenges.
Design and construct your ultimate fortress, then defend it from waves of enemies. This game blends tower defense strategy with first-person shooter action, allowing you to build and fight in a dynamic world. Survive as long as possible by fortifying your base and engaging attackers.
Defend your kingdom by strategically activating ancient gear-driven machines. Summon troops, construct defenses, and unleash powerful weapons against endless enemy waves. Adapt to diverse environments and enemy tactics to achieve victory.
Command a galactic defense to protect your space tower from alien invaders. Strategically upgrade your tower's abilities and weapons to withstand relentless waves of enemies and defeat powerful bosses. Enjoy idle gameplay with ample rewards, even while offline.
Defend your home planet in this roguelike tower defense game. Build and upgrade defenses to fend off alien invaders. Experience deep strategy with unique playthroughs and unlockable sentinels.
Defend your homeland from waves of evil robots by strategically deploying and upgrading a variety of powerful weapons. Explore diverse landscapes and adapt your tactics to overcome increasingly challenging robotic invaders in this exhilarating tower defense game.
Build a powerful fortress and upgrade its defenses to withstand waves of monsters. Reset your stats after each round to earn more gold and enhance your base for further progress. Discover new worlds and utilize powerful cards to become a great general.
Build defenses and fight off alien monsters in your room. Tap to create structures and upgrade weapons to survive the invasion until darkness passes. Outlast the devil monsters to win.
Engage in strategic real-time combat within a blocky sci-fi universe. Build defenses, command diverse alien armies, and lead heroes through a vast campaign or multiplayer battles.
Engage in epic sci-fi battles to conquer the galaxy. Discover new planets, build military bases, and command powerful fleets. Form alliances and wage wars to expand your territory and achieve universal domination.
Defend your space fortress against alien invasions in this vibrant defense game. Strategically build your base, deploy a variety of weapons and traps, and customize enemy paths to survive hundreds of waves. Compete for high scores in an online hall of fame.
Defend Earth from an alien invasion by building a strategic space station fortress. Deploy a variety of upgradable weapons and traps to overcome over 150 waves of enemies and challenging bosses.
Defend your sheep from alien invaders in this classic 3D tower defense strategy game. Deploy a variety of upgradeable weapons and think fast to survive over 100 maps and endless waves of enemies. Compete with friends on global leaderboards.
Engage in intense 3D sci-fi real-time strategy battles in space. Command your fleet, customize spaceships with advanced weaponry, and unlock commanders to conquer galaxies. Explore planets and master strategic combat to achieve victory.
Engage in intense space combat, piloting a lone spaceship to defend the galaxy from alien invaders. Dodge enemy fire, upgrade your spacecraft, and challenge powerful bosses in various game modes. Plan your strategy and unleash your fighter's full potential.
Defend an ancient stronghold from alien invaders using powerful technologies. Build and upgrade towers in a classic tower defense experience with unique levels and diverse enemies. Enjoy an offline, ad-free strategy game with a compelling storyline.
Command powerful fleets in epic space battles, manage resources, and build planetary facilities. Customize your starships and lead your alliance to conquer the galaxy in this sci-fi real-time strategy multiplayer saga.
Pilot a starship in an intense arcade shooter to defend the galaxy from alien invaders. Engage in challenging campaigns, battle epic bosses, and compete with other players online. Your mission is to save humanity from an intergalactic war.