Comparison

Mars Quest vs HARM Invaders

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

Head to head
About

Mars Quest

Embark on a challenging retro adventure guiding an astronaut through alien-infested Martian levels. Experience nostalgic 8-bit graphics and music while avoiding obstacles and increasing speed. Compete with friends via Game Center.

Highlights
  • 8-bit retro music
  • Guide astronaut through levels
  • Avoid aliens and obstacles
  • Smart level progression
  • Increasing speed challenges
  • Game Center scores and achievements
Features
Read full description

A must-have if you grew up in the eighties or if you are a C64, Atari, arcade or 8-bit lover. Nostalgic feelings guaranteed! *** REVIEWS *** - SlideToPlay.com: "Mars Quest is a good choice if you need to get your nostalgia on" - AppsOnTapp.com: "a fun and addicting retro game" - AppFavour.com: "Today's Best Apps August 18th 2012" *** WHAT PLAYERS SAY *** - "Super fun game that can be played over and over again. I'm ultra picky about games I let take up valuable space on my iPhone, but this one is a must!" - "A great little arcade game that I enjoy playing" - "Fun game, addictive" - "Once you start, you dont want to stop playing :)" *** FEATURES *** - Game Center scores and achievements - 8-bit retro music - Guide the astronaut safely through all levels - Avoid all aliens and obstacles on Mars - Think smart to advance to the next level - Be careful when the speed level increases!

About

HARM Invaders

Command Earth's first space fighter to defend humanity from an alien threat originating from Mars. Engage in fast-paced 3D combat across the solar system, researching weapons and battling replicating alien machines.

Highlights
  • Real-time 3D graphics
  • Diverse enemy types
  • Dozens of weapons
  • Space ship 3D combat
  • Local & Global high-score tables
  • Rank system
Features
Read full description

The year is 2115 and an artificial repeating radio signal has been detected coming from the vicinity of Mars. You as commander of Earth's first and only Space Fighter are sent to investigate. On Arrival at Mars a huge electrical vortex is detected in orbit, from which spews a ‘Hungry Alien Replicating Machine’. The Alien Machines consume minerals from rocks to replicate. Commander, you must destroy the ‘HARM’ before they can reach Earth. Push them back out of our Solar System at all costs. Battle a relentless enemy that won’t stop until the Earth is consumed, in this fast paced action 3D shoot-em-up. Features of HARM Invaders:- * Real time 3d graphics, Using METAL on compatible devices * Many different types or replicating enemy * Dozens of weapons to research and use * Pause button for when the heat gets too hot. * Play across the entire Solar System * Space Ship 3D combat * Particle effects * Local & Global High-score table * Separate High-score table for your personal best * Rank system, rise to the rank of Grand Admiral of the Space fleet. * Works best on ipad2+ (Recommend iPad Air+) * Compatible with MFi Mad Catz Controller plus all iCade type controllers.

Screenshots

Mars Quest4 screens
HARM Invaders4 screens

Verdict

The call

The clearest difference is review sentiment: Mars Quest at 68% against HARM Invaders's 0%. Mars Quest also leads on rating (4.0 vs 3.0) and update cadence (fortnightly vs every 34 months). HARM Invaders's advantage is ads (none vs shown) and iOS requirement (8.0 vs 13.0). On price, in-app purchases, monetization model and device support 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. Mars Quest sells 5 one-off in-app purchases and HARM Invaders sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Mars Quest holds the better App Store score, 4.0 against 3.0. That said, the two scores are not equally well evidenced: Mars Quest has 91 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 68% of Mars Quest's written reviews are positive against 0% of HARM Invaders's.

UpkeepUpdate frequency

Mars Quest ships an update fortnightly, HARM Invaders every 34 months. The most recent releases landed on October 5, 2026 and October 2, 2026 respectively.

Scorecard6 real differences · 4 level
Mars Quest versus HARM Invaders: the parameters behind the verdict, then further details
ParameterMars QuestHARM Invaders
PriceFreeFree
Rating4.0 (91 ratings) — better3.0 (2 ratings)
Positive reviews68.5% of reviews — better0.0% of reviews
Number of ratings91 — better2
Update frequencyFortnightly — betterEvery 34 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.08.0 — better
Further details — not scored
Size98 MB158 MB
Age rating12+4+
DeveloperFirst Class Media B.V.QED Gaming PTY. Ltd

Customer experience

Mars Quest

All ratings91 ratings
Positive74.7%
Neutral7.7%
Negative17.6%
Written reviews92 reviews
Positive68.5%
Neutral8.7%
Negative22.8%

HARM Invaders

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

5 purchases

Mars Quest

One-time5
  • Remove advertising$0.99
  • 1 extra life$0.99
  • 5 extra lives$1.99
Show 2 more
  • 10 extra lives$2.99
  • 25 extra lives$4.99
4 purchases

HARM Invaders

One-time4
  • 500 Research Machine Credits$0.99
  • 500 Brain Power$1.99
  • 2000 Brain Power$4.99
Show 1 more
  • 10000 Research Machine Credits$9.99

Questions

Is Mars Quest free?
Mars Quest is free to download, with in-app purchases available.
Is HARM Invaders free?
HARM Invaders is free to download, with in-app purchases available.
Which has better reviews, Mars Quest or HARM Invaders?
Mars Quest is rated higher. Mars Quest averages 4.0 out of 5 from 91 ratings, while HARM Invaders averages 3.0 from 2 ratings.
Do Mars Quest or HARM Invaders have ads?
Mars Quest shows ads; HARM Invaders does not.
Which is updated more often, Mars Quest or HARM Invaders?
Mars Quest ships an update fortnightly, and HARM Invaders every 34 months. Most recently, Mars Quest was updated on October 5, 2026 and HARM Invaders on October 2, 2026.

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