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.



195+ iOS apps & games curated and reviewed
With an average user rating of 4.4★, the quantum x planet defense category is one of the App Store's strongest. Browse all 195+ apps and games we track, sorted so the most loved ones surface first.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 3.0★ (10) | No | No | May 2026 | |
| 2 | Free | 4.8★ (9K) | Yes | Yes | Aug 2026 | |
| 3 | Free was $3.99 | 4.8★ (388K) | Yes | Yes | Aug 2026 | |
| 4 | Free | 4.7★ (8K) | Yes | Yes | Aug 2026 | |
| 5 | Free | 4.5★ (52K) | Yes | Yes | Aug 2026 | |
| 6 | Free | 4.5★ (4.4K) | Yes | Yes | Aug 2026 | |
| 7 | $2.99 | 4.4★ (828) | No | Yes | Aug 2026 | |
| 8 | Free | 4.8★ (1.8K) | Yes | Yes | Aug 2026 |



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.





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 planet from monster invasions by summoning, merging, and evolving heroes. This roguelike tower defense game offers quick, strategic matches with endless replayability. Enjoy casual fun or competitive PvP with adorable characters and deep tactical choices.


Engage in a unique tower defense experience where strategy meets chance. Assemble a battle deck, strategically place towers and roads, and defend your base against waves of enemies. Level up, unlock new units, and compete in events to claim victory.


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.


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 strategic tower defense battles across land, sea, and air. Protect your base, upgrade weapons, and unlock new abilities to overcome enemy assaults. Earn victory points and develop your ultimate defense strategy to win the campaign.


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 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.


Engage in strategic tower defense battles with roguelike elements. Upgrade your tower, collect resources, and refine your tactics to withstand endless waves of enemies. Enjoy stylized geometric art and addictive idle gameplay.


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.


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 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.


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 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.


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.