Mars Quest vs Line Defense
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
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.
- 8-bit retro music
- Guide astronaut through levels
- Avoid aliens and obstacles
- Smart level progression
- Increasing speed challenges
- Game Center scores and achievements
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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!
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.
- 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
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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
Verdict
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
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.
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.
Mars Quest ships an update fortnightly, Line Defense monthly. The most recent releases landed on October 23, 2026 and October 21, 2026 respectively.
| Parameter | Mars Quest | Line Defense |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (91 ratings) | 4.6 (14 ratings) — better |
| Positive reviews | 68.5% of reviews — better | 63.3% of reviews |
| Number of ratings | 91 — better | 14 |
| Update frequency | Fortnightly — better | Monthly |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 8.1 — better |
| Further details — not scored | ||
| Size | 98 MB | 137 MB |
| Age rating | 12+ | 4+ |
| Developer | First Class Media B.V. | Legal Radiation Team |
Customer experience
Mars Quest
Line Defense
In-app purchases
Mars Quest
- Remove advertising$0.99
- 1 extra life$0.99
- 5 extra lives$1.99
Show 2 moreShow fewer
- 10 extra lives$2.99
- 25 extra lives$4.99
Line Defense
- 50 Crystals$0.99
- Remove Ads$0.99
- 125 Crystals$1.99
Show 1 moreShow fewer
- 250 Crystals$2.99









