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.






234+ 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 234+ 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 | $1.99 | 2.5★ (54) | No | No | Jul 2026 | |
| 4 | Free | — | Yes | No | May 2026 | |
| 5 | Free | 4.7★ (26K) | Yes | Yes | Aug 2026 | |
| 6 | Free | 4.4★ (454) | No | Yes | Jul 2026 | |
| 7 | Free | 5.0★ (1) | Yes | No | May 2026 | |
| 8 | Free | 4.5★ (5.2K) | Yes | Yes | Aug 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.









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.




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 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.


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 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.


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.


Relive the classic arcade experience with this remake of Galaxian. Control your defender ship by tilting your phone and shoot waves of alien spaceships to achieve a high score. This compact game offers classic space shooter action.




Engage in a classic side-scrolling arcade space shooter. Battle an alien horde across unique levels, upgrading your ship with powerful enhancements and facing formidable boss enemies. Compete for high scores on GameCenter.


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.


A fast-paced arcade defense game where players must react quickly to eliminate enemies approaching from all directions. Test your reflexes and endurance to defend your base from endless waves of invaders.




Stay connected with your home or business from anywhere. This app allows you to view live feeds, review recorded footage, and receive instant motion detection alerts. You can also easily share important clips and customize recording schedules.


Experience a unique tower defense game with Plinko-inspired physics. Control a retro arcade-style Battle Turret, shape the battlefield with powerful peg abilities, and research upgrades to survive increasingly difficult stages. Earn XP, unlock talents, and customize your defenses for deeper chaos.


Strategically grow your defenses to avoid incoming enemies. Protect your base by expanding your army and fortifying your position.


Engage in fast-paced space combat to defend the galaxy from alien invaders. Blast through unlimited levels, improve your score, and master increasingly challenging gameplay. Enjoy vivid graphics and cool sound effects in this timeless arcade experience.