Defend humanoids from alien invaders in this retro 80s-style arcade shooter. Experience fast-paced gameplay with classic mechanics, enhanced graphics, and engaging power-ups across hundreds of levels on three different planets.






213+ iOS apps & games curated and reviewed
Interstellar Guardian is the household name in defender arcade, but it's far from the only option. We track 213+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | Free | 4.8★ (36) | No | No | Jul 2026 | |
| 2 | Free | — | No | No | May 2026 | |
| 3 | Free | 4.7★ (26K) | Yes | Yes | Jul 2026 | |
| 4 | Free | — | Yes | No | May 2026 | |
| 5 | Free | 4.2★ (1.1K) | Yes | Yes | Jul 2026 | |
| 6 | Free | 4.4★ (454) | No | Yes | Jul 2026 | |
| 7 | Free | 5.0★ (1) | Yes | No | May 2026 | |
| 8 | $1.99 | 2.5★ (51) | No | No | Jul 2026 |






Defend humanoids from alien invaders in this retro 80s-style arcade shooter. Experience fast-paced gameplay with classic mechanics, enhanced graphics, and engaging power-ups across hundreds of levels on three different planets.









Blast through waves of alien invaders in this classic arcade space shooter. Collect and upgrade over 100 unique ships, complete exciting missions, and compete on global leaderboards. Enjoy short game sessions or an action-packed campaign with stunning graphics.




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 Earth from an alien invasion in this fast-paced arcade space shooter. Upgrade your ship with powerful enhancements and conquer over 150 unique levels, including challenging boss battles. Compete for high scores and save your progress.


Engage in thrilling pixel art space battles, upgrade your starship, and test your piloting skills against friends. Experience dynamic gameplay and endless adventures inspired by classic arcade games.


Relive a classic arcade experience by defending astronauts from alien abduction and destroying enemy ships. Be careful not to harm the astronauts, as their safety is crucial to preventing planetary destruction and mutant alien transformations.


Lead your warriors and defend your kingdom from a dark dragon army in this epic tower defense game. Explore over 500 levels, master 4 elements, and upgrade your weapons and magic to defeat powerful bosses and evil magic.


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.


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.


Engage in strategic tower defense battles in a magical world. Assemble heroes, utilize unique skills, and compete in thrilling PVP. Enjoy idle cultivation features for a relaxed yet engaging experience.


Defend a central core against endless waves of geometric enemies in this minimalist tower defense game. Strategically upgrade your single tower with powerful abilities and permanent hardware enhancements to survive increasingly difficult challenges and epic boss battles.


Defend your planet from an relentless invasion force. This action-packed game challenges your reflexes and strategic thinking as you manage increasing pressure from attackers. Experience classic gameplay with modern features like level selection and global leaderboards.


Engage in a strategic dungeon adventure blending tower defense, roguelike, and card strategy. Assemble a hero squad with unique skills, employ clever tactics to overcome monster waves, and discover hidden treasures. Winning relies on strategy and choices, not luck.


Engage in thrilling arcade-style space combat, defending the galaxy from alien invaders. Pilot customizable starships, upgrade weapons, and face challenging missions and bosses. Experience a blend of classic nostalgia and modern action with competitive multiplayer and leaderboards.




Manage your own virtual arcade center. Collect chips from customers, convert them to cash, and expand your business by opening new playgrounds to attract more visitors.


Collect and merge units to build a powerful deck for strategic base defense. Engage in PvP battles or team up with friends in Co-Op mode to conquer enemies and earn rewards. Master unique unit abilities and faction synergies to prevail.


Build intricate mazes to defend against waves of enemies in this 2D area defense game. Choose from various towers and weapons to create strategic defenses. Offers both free-form maze building and guided story modes with fixed paths.