Comparison

Mars Quest vs Line Defense

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

Line Defense

Defend Earth from an alien invasion with fast-paced, retro-inspired arcade action. Utilize simple one-finger controls to deploy defenses, collect upgrades, and battle bosses across diverse maps. Enjoy challenging gameplay with a variety of modes and achievements.

Highlights
  • One-finger swipe control
  • Unique power-ups and bosses
  • Collect crystals for upgrades
  • 20 colorful maps and Survival mode
  • Mini games with rewards
  • Game Center Leaderboards
Features
Read full description

Inspired from old school retro games, Line Defense offers a fast paced challenging experience with simple controls and frenzy action. Mayday! Alien Invasion: New York, Paris, Moscow, London, Kairo, Beijing, Athens, Dubai. The alien menace strikes without remorse. Starting from major cities of the world, they will reach yours as well. Missiles, bombs, asteroids, alien ships, motherships and more! You are in a position, just with your finger, to protect the earth in this very simple, yet fun and addictive game! Line Defense offers a simple but extremely challenging arcade game experience, mixing mechanics from classic games like Breakout and Missile Command along with mobile game design innovations. The game is designed both for casual and hardcore players. Features: • Simple one finger swipe control. • Unique power-ups, bosses & Motherships. • Collect crystals and get special upgrades for your line (cannons, radar, shield etc.). • 20 colorful maps & Survival mode. • Mini Games for fun and rewards with surprising twists to the basic game-play. • Amazing original soundtrack with dynamic in-game music. • Easy to play - no tutorial needed. • Includes 30+ achievements. • Game Center Leaderboards Support. The game was featured by Apple under "New Games We Love" and "Games We Play Today".

Screenshots

Mars Quest4 screens
Line Defense4 screens

Verdict

The call

The clearest difference is rating: Line Defense at 4.6 against Mars Quest's 4.0. Line Defense also leads on ads (none vs shown) and iOS requirement (8.1 vs 13.0). Mars Quest's advantage is ratings volume (91 vs 14). On price, review sentiment, update cadence and in-app purchases 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 Line Defense 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

Line Defense holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Mars Quest has 91 ratings behind it against 14, so its average is the more settled of the two. Written reviews complicate that: 68% of Mars Quest's written reviews are positive against 63% of Line Defense's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Mars Quest ships an update fortnightly, Line Defense monthly. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.

Scorecard4 real differences · 6 level
Mars Quest versus Line Defense: the parameters behind the verdict, then further details
ParameterMars QuestLine Defense
PriceFreeFree
Rating4.0 (91 ratings)4.6 (14 ratings) — better
Positive reviews68.5% of reviews — better63.3% of reviews
Number of ratings91 — better14
Update frequencyFortnightly — betterMonthly
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.08.1 — better
Further details — not scored
Size98 MB137 MB
Age rating12+4+
DeveloperFirst Class Media B.V.Legal Radiation Team

Customer experience

Mars Quest

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

Line Defense

All ratings14 ratings
Positive92.9%
Neutral0.0%
Negative7.1%
Written reviews30 reviews
Positive63.3%
Neutral10.0%
Negative26.7%

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

Line Defense

One-time4
  • 50 Crystals$0.99
  • Remove Ads$0.99
  • 125 Crystals$1.99
Show 1 more
  • 250 Crystals$2.99

Questions

Is Mars Quest free?
Mars Quest is free to download, with in-app purchases available.
Is Line Defense free?
Line Defense is free to download, with in-app purchases available.
Which has better reviews, Mars Quest or Line Defense?
Line Defense is rated higher. Mars Quest averages 4.0 out of 5 from 91 ratings, while Line Defense averages 4.6 from 14 ratings.
Do Mars Quest or Line Defense have ads?
Mars Quest shows ads; Line Defense does not.
Which is updated more often, Mars Quest or Line Defense?
Mars Quest ships an update fortnightly, and Line Defense monthly. Most recently, Mars Quest was updated on October 23, 2026 and Line Defense on October 21, 2026.

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