Comparison

Space Cadet Defender HD vs Galaxy Invaders

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Space Cadet Defender HD

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.

Highlights
  • HD retina graphics
  • 150+ unique levels
  • Ship upgrades
  • Boss levels
  • Unique powerups
  • GameCenter high scores
Features
Read full description

Defend Earth from the Alien Horde in this arcade/action space shooter. * WHAT'S NEW: HD graphics for retina screens, new levels, new ship upgrades. FEATURES: - High Definition retina graphics enhanced for the new iPad and iPhone. - Fast paced, exciting invaders style arcade game. - 150+ Unique levels, can you pass them all? - Enhance your ship with powerful upgrades. - Boss levels with powerful Alien Overlords. - Unique powerups. - High scores via GameCenter. - Save and restore in-progress games. STORY: These are troubling times. Earth’s very existence is threatened. Alien invaders from space have been sent to destroy our planet. You have been called up to repel their attack. You must plan your battle strategy well and upgrade your fighter ship to defeat the increasingly advanced aliens. Beware, their powerful overlords are watching and will join the fight to help the alien forces destroy us. We’re counting on you. Earth is counting on you. Suit up Space Cadet!

About

Galaxy Invaders

Engage in an ultimate space shooting game with classic arcade style and modern expression. Explore galaxies, battle alien invaders with advanced weaponry, and collect powerful spaceships and drones. Enjoy offline play and compete with others globally.

Highlights
  • Classic arcade space shooting gameplay
  • Multiplayer modes (1v1, 1v3, 2v2, survival)
  • PVP online and co-op missions
  • Variety of enemies and challenging bosses
  • Collect 15 spaceships and 12 drones
  • Unlock legendary ships with superpowers
  • Offline playable
Features
Read full description

Galaxy Invaders Space Attack is the ultimate space shooting game that has stormed on iOS. With millions of downloads and rave reviews, it's no wonder this game is at the top of the charts. If you are one of the big fans of those classic galaxy shooting game series like galaga pixel shooter, galaxia, galaxian, galactica, space shooter, shoot 'em up, space invaders, galaxiga, Air Strike Force and Chicken Shooter, then Galaxy Invaders Space Shooter is definitely your best choice because it is perfect for you. The classic game style, but the new way of expression will fascinate you while you play. Galaxy Invaders Space Shooter will bring you new enemies and bosses in the Galaxy War. Do you think you have enough skills to survive this epic battle with these alien invaders? Explore the depths of space, taking on missions and challenges across different planets in the galaxy. Each level presents increasingly difficult challenges, with advanced weaponry and intelligent adversary AI, making the gameplay both engaging and challenging. Galaxy Invaders Space Shooter is not your average run-of-the-mill shooting game. It offers a fantastic storyline with stunning graphics, dramatic intergalactic settings, and a spine-chilling soundtrack that keeps you fully immersed in the game. Earn points and rewards as you progress through the game, which can be used to unlock new weapons, upgrades, and power-ups. With smooth and intuitive controls, Galaxy Invaders Space Shooter is easy to play but difficult to master, making it both accessible for newbies and challenging for seasoned players. Features: + Multiplayer mode: 1 vs 1, 1 vs 3, 2vs 2, survival. + Compete with other players in PVP online shooting games or co-op with friends to complete missions and earn rewards. With the chance to mark your name on the global leaderboard, it’s a perfect opportunity to show off your skills. + Featuring a variety of enemies and challenging bosses, each level offers a unique space battle experience. + With 15 spaceships and 12 drones to collect, you can build up a formidable fleet, with each ship and drone offering unique skills and playstyles. Unlock legendary space shooter ships to gain superpowers and add them to your collection. + One of the most exciting space action shooting games. + Various enemies and bosses fighting. + True space battle experience. + Unlock legendary space shooter ships to get a superpower in your aircraft collection. + Galaxy Invaders Space Shooter is fully playable offline so you can enjoy playing without internet connection requirements. + It’s the perfect arcade shooter games Galaxy Invaders Space Shooter - galaxy attack offline games for free. How to play : + Choose your spaceship: Select one of the 15 spaceships with unique abilities and skills. + Equip your ship: Choose from a range of weapons, shields, engines, and special bonus upgrades to make your spaceship the ultimate killing machine. + Shoot and destroy: Navigate through different galaxies and destroy waves of alien enemies, including challenging bosses. Use your powerful weapons and shields to stay alive. + Collect drones: Collect 12 drones, each with unique abilities, and use them to aid you in your battles. + Upgrade your ship: Gain points and rewards as you complete levels and use them to upgrade your weapons and spaceships or unlock legendary spaceships. + Play multiplayer: Compete with other players in PVP online shooting games, co-op with friends, and climb the global leaderboard to show off your skills. + Play offline: Play without requiring an internet connection - perfect for when you don’t have access to wifi. + Action, Shooter, Bulletstorm, Casual, Single player, Stylized, Offline Join the millions of players worldwide who have already downloaded this addictive and exciting intergalactic shooter game. It's time to take on the alien invaders and show them who's boss!

Screenshots

Space Cadet Defender HD4 screens
Galaxy Invaders4 screens

Verdict

The call

The clearest difference is ads: Space Cadet Defender HD at none against Galaxy Invaders's shown. Space Cadet Defender HD also leads on review sentiment (76% vs 47%) and ratings volume (468 vs 56). Galaxy Invaders's advantage is update cadence (every 2 weeks vs every 2 months). On price, rating, in-app purchases and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Space Cadet Defender HD sells 6 one-off in-app purchases and Galaxy Invaders sells 27 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Space Cadet Defender HD holds the better App Store score, 4.4 against 4.2. That said, the two scores are not equally well evidenced: Space Cadet Defender HD has 468 ratings behind it against 56, so its average is the more settled of the two. Written reviews point the same way: 76% of Space Cadet Defender HD's written reviews are positive against 47% of Galaxy Invaders's.

UpkeepUpdate frequency

Space Cadet Defender HD ships an update every 2 months, Galaxy Invaders every 2 weeks. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

Scorecard5 real differences · 5 level
Space Cadet Defender HD versus Galaxy Invaders: the parameters behind the verdict, then further details
ParameterSpace Cadet Defender HDGalaxy Invaders
PriceFreeFree
Rating4.4 (468 ratings) — better4.2 (56 ratings)
Positive reviews76.0% of reviews — better47.4% of reviews
Number of ratings468 — better56
Update frequencyEvery 2 monthsEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better15.0
Further details — not scored
Size28 MB169 MB
Age rating4+9+
DeveloperSixHourSoft LLCPUMPKIN VN CO., LTD

Customer experience

Space Cadet Defender HD

All ratings468 ratings
Positive85.9%
Neutral5.3%
Negative8.8%
Written reviews217 reviews
Positive76.0%
Neutral7.4%
Negative16.6%

Galaxy Invaders

All ratings56 ratings
Positive80.4%
Neutral5.4%
Negative14.3%
Written reviews19 reviews
Positive47.4%
Neutral15.8%
Negative36.8%

Bugs and requests

Space Cadet Defender HD

Reported bugs

3 issues
  • Crashes on certain devices
  • Progression loss when resetting game
  • Unresponsive controls

Requested features

4 requests
  • More levels and content
  • Level selection or reset option
  • Improved controls and responsiveness
  • Ability to replay completed levels

Galaxy Invaders

Not enough reviews yet to summarise bugs or requests.

In-app purchases

6 purchases

Space Cadet Defender HD

One-time6
  • 5000 Medals$0.99
  • Second Invasion$1.99
  • Third Invasion$1.99
Show 3 more
  • 30000 Medals$4.99
  • 70000 Medals$9.99
  • 140000 Medals$14.99
27 purchases

Galaxy Invaders

One-time27
  • SHIP PART 1$0.99
  • Crystal 1$1.99
  • Revive Crystal$1.99
Show 24 more
  • SHIP PART 2$1.99
  • Powerball Ticket 1$1.99
  • Boosters Pack$2.99
  • Gold Pack$2.99
  • PIGGY BANK 1$2.99
  • Starter Pack$2.99
  • Reflex and Swarm Pack$2.99
  • SHIP PART 4$3.99
  • Crystal 2$4.99
  • Subscription Basic$4.99
  • WING 5$4.99
  • SMALL EVENT PACK$4.99
  • PIGGY BANK 2$4.99
  • SKIN 5$4.99
  • Weapon Variant 5$4.99
  • PIGGY BANK 3$8.99
  • Reinforcement Pack$8.99
  • Powerball Ticket 3$9.99
  • Crystal 3$9.99
  • BIG EVENT PACK$17.99
  • Subscription Elite$17.99
  • SALE 50% OFF$17.99
  • Crystal 4$19.99
  • Crystal 5$42.99

Questions

Is Space Cadet Defender HD free?
Space Cadet Defender HD is free to download, with in-app purchases available.
Is Galaxy Invaders free?
Galaxy Invaders is free to download, with in-app purchases available.
Which has better reviews, Space Cadet Defender HD or Galaxy Invaders?
Space Cadet Defender HD is rated higher. Space Cadet Defender HD averages 4.4 out of 5 from 468 ratings, while Galaxy Invaders averages 4.2 from 56 ratings.
Do Space Cadet Defender HD or Galaxy Invaders have ads?
Galaxy Invaders shows ads; Space Cadet Defender HD does not.
Which is updated more often, Space Cadet Defender HD or Galaxy Invaders?
Space Cadet Defender HD ships an update every 2 months, and Galaxy Invaders every 2 weeks. Most recently, Space Cadet Defender HD was updated on October 23, 2026 and Galaxy Invaders on October 21, 2026.

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