Castle Defender vs Microbe Explorer
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Castle Defender
Defend your town from relentless skeleton armies in this arcade shooting tower defense game. Upgrade weapons and defenses to survive increasing waves and defeat the undead boss. Shoot your way through the hordes to protect the city and its people.
- Wave-based skeleton defense
- Weapon and defense upgrades
- Boss battles
- Arcade shooting gameplay
- Town protection
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Waves of skeleton armies are attacking your town, and you have no time as the undead keep attacking you. The machine gun is undoubtedly what you need for this! Be prepared to deal with the increasing waves of skeletons by upgrading your weapons, defences, and reloading ammo. It's time to shoot some bones! Troopers vs Skeletons is a unique shooting tower defence arcade game. In the game, you must defend your town for as long as possible to reach the boss of the undead. Are you able to hold off the hostile forces attacking your town? Fight for the city and its people!
Microbe Explorer
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Become the Microbe Explorer and protect the alien from bugs by dodging through various enemies. Test your dodging skills and see how far you can go without getting hit by the enemies! - Press and drag to move the player - Collect as many items as you can and head to the boss bug - Destroy the boss bug by consuming the items you have collected - Use a booster to speed up Don't miss out on an opportunity to become a Microbe Explorer!
Screenshots
Verdict
The clearest difference is in-app purchases: Microbe Explorer at none against Castle Defender's 1. Microbe Explorer also leads on update cadence (every 4 weeks vs every 26 months) and iOS requirement (11.0 vs 15.0). On price, ads 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
Both are free to download. Castle Defender sells 1 one-off in-app purchase. Microbe Explorer asks for nothing beyond the download.
Castle Defender ships an update every 26 months, Microbe Explorer every 4 weeks. The most recent releases landed on October 8, 2026 and October 1, 2026 respectively.
| Parameter | Castle Defender | Microbe Explorer |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 26 months | Every 4 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 215 MB | 126 MB |
| Age rating | 17+ | 4+ |
| Developer | Maysalward UK | Adknown |
In-app purchases
Castle Defender
- Remove Ads$3.99
Microbe Explorer
No in-app purchases
Questions
Is Castle Defender free?
Is Microbe Explorer free?
Do Castle Defender or Microbe Explorer have ads?
Which is updated more often, Castle Defender or Microbe Explorer?
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