Defend your energy barrels from alien invaders in this retro arcade space shooter. Enjoy simple, intuitive controls and blast through waves of enemies with various weapons and challenging boss fights.






240+ iOS apps & games curated and reviewed
Barrel Defender is the household name in defender galaxy, but it's far from the only option. We track 240+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 | $0.99 | 4.0★ (1) | No | No | May 2026 | |
| 2 | Free | 2.0★ (2) | Yes | No | May 2026 | |
| 3 | Free | 5.0★ (1) | No | No | May 2026 | |
| 4 | Free | 3.8★ (88) | Yes | No | Jul 2026 | |
| 5 | Free | 4.6★ (5) | Yes | Yes | May 2026 | |
| 6 | Free | 3.0★ (2) | Yes | No | May 2026 | |
| 7 | Free | 4.6★ (39) | Yes | Yes | Jul 2026 | |
| 8 | Free | — | No | No | May 2026 |






Defend your energy barrels from alien invaders in this retro arcade space shooter. Enjoy simple, intuitive controls and blast through waves of enemies with various weapons and challenging boss fights.


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 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.


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.


Engage in an interstellar battle to conquer the cosmos and eradicate invading space flies. Upgrade your spacecraft and embark on an epic journey through multiple levels of captivating space shooter action with intuitive one-finger controls.


Defend the galaxy in this retro arcade shoot 'em up. Utilize powerful weapons like neutron lasers and smart bombs to defeat waves of mutating space invaders. Keep moving, keep firing, and strategize your smart bomb usage to save the Megaverse.


Pilot powerful spaceships against relentless alien invaders in thrilling arcade-style space battles. Upgrade your arsenal, face epic boss battles, and enjoy diverse game modes with stunning graphics and sound. This free-to-play adventure offers endless replayability.




Engage in intense first-person space combat as a turret gunner. Protect friendly assets and eliminate waves of alien attackers using a variety of weapons. Features two engaging game modes with multiple levels.


Engage in classic arcade-style space combat with a 150-level campaign. Collect items, upgrade your ship and weapons, and recruit warriors to fight alien waves and epic bosses. Experience fast-paced action with responsive touch controls.


A retro-style shooter game with unique ships and power-ups. Dodge enemies, collect upgrades, and aim for a high score in an endless progression. This game is exclusively for eligible Motivv Health Studios members.


Engage in brain-training fun with a nostalgic twist. Defend your planet by equipping and upgrading turrets to destroy incoming blocks in endless waves. Compete in tournaments for a chance to win real cash prizes.


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 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 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.


Command your forces in a galactic war against robots, spirits, and devils. Build defenses, deploy heroes, and strategize in real-time battles to protect your world. Compete in tournaments and rise through the ranks to become the ultimate defender.


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 a first-person 3D space shooter where you control a turret to defend friendly objects and destroy enemies. Utilize a variety of primary and secondary weapons across campaign and survival modes. Compete with friends via Game Center and back up your progress with iCloud.


Defend Earth from alien invaders in this fast-paced arcade shooter. Progress through 50 unique levels, upgrade your ship with powerful enhancements, and face off against challenging boss battles. Compete with friends by viewing local and world high scores.