Engage in real-time strategy by colonizing planets and building creatures. Your objective is to eliminate all enemy forces and conquer their territories. This game offers a unique approach to the tower defense genre.



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With an average user rating of 4.4★, the quantum x planet defense category is one of the App Store's strongest. Browse all 177+ apps and games we track, sorted so the most loved ones surface first.



Engage in real-time strategy by colonizing planets and building creatures. Your objective is to eliminate all enemy forces and conquer their territories. This game offers a unique approach to the tower defense genre.






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.




Strategically place and merge weapons to defend a vibrant cube world. Demolish waves of incoming enemies by upgrading your arsenal with powerful skills. Protect the world from the encroaching evil hexes.


Unleash your destructive power on planets with a vast arsenal of weapons. From nuclear missiles and lasers to monstrous creatures and asteroids, obliterate celestial bodies in this engaging simulator.


Defend your sheep from alien invaders by strategically placing and upgrading a variety of weapons. Engage in a unique 3D tower defense experience with over 100 maps and 17 alien types. Compete globally and replay your best games.


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.


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 a classic tower defense experience with strategic gameplay and action-packed battles. Explore diverse campaigns, challenging maps, and unique towers to defeat various enemies across multiple world themes. Enjoy a highly-rated defense game with regular updates.


Defend your castle from relentless waves of monsters using a variety of magical spells and defensive structures. Upgrade your city wall, manage mana, and equip powerful bows to repel invaders and defeat bosses. Compete globally in battle mode.


Defend a charming robot world from an invading machine army. Command a variety of robot units, utilize new abilities, and battle through diverse environments. Engage in fast-paced defense and arcade-style mini-games for hours of strategic fun.


Lead humanity's last stand against a rogue AI uprising in this hybrid tower defense game. Customize your defender with advanced cyber tech, deploy futuristic weapons, and harness enemy energy to unlock powerful upgrades and skills. Experience endless replayability with procedurally generated challenges and tactical depth.


Defend your airspace in an intense arcade shooter against an alien invasion. Engage in fast-paced, vertical ground-to-air combat with realistic visuals and a thrilling story. Perfect for quick bursts of action.


Defeat waves of aliens to gain resources and power up your neon towers. This offline sci-fi tower defense game features incremental upgrades and automatic combat, even when you're not playing. Master alien invasion strategies to push deeper into the galaxy.


Defend the world from an alien invasion by strategically placing devastating weapons and traps. Explore diverse environments across numerous levels, utilizing a vast arsenal and unique gameplay modes to thwart the enemy.


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.


Defend a vibrant planet from an invading robot army in this engaging tower defense game. Strategically deploy a variety of cute robot units across a 2D grid to overcome diverse enemies and rescue captured friends. Explore numerous levels, mini-games, and unlockable content for hours of tactical fun.


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 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.


Embark on an interstellar adventure to explore the vastness of the galaxy. Your mission is to destroy planets, upgrade your arsenal, and conquer challenging bosses. Prepare for an epic cosmic journey.


Command anti-air defenses in an intense tower defense shooter. Battle waves of hostile aircraft using intuitive swipe controls, unlock powerful skills, and face challenging aerial bosses. Progress through diverse missions and dynamic battlefields, even offline.