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Best Castle Defense Online Apps & Games

185+ iOS apps & games curated and reviewed

4.6 avg rating
19 free apps & games
Updated May 2026

Every iPhone needs a few good castle defense online apps. We benchmark 185+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Top Picks for Castle Defense Online

Castle Defense Online - 4p#1

Castle Defense Online - 4p by donghwan kim

Castle Defense Online
Editor's Choice
🎮 Games
4.2😊(98 ratings)
FreeAdsIn-App Purchases
Castle Defense Online - 4p screenshot 1
Castle Defense Online - 4p screenshot 2
Castle Defense Online - 4p screenshot 3
Castle Defense Online - 4p screenshot 4
Castle Defense Online - 4p screenshot 5
Castle Defense Online - 4p screenshot 6

Castle Defense Online is the world's first real-time multiplayer defense game where 4 players can cooperate in a 2D horizontal scroll. Collect unique characters, skills, and items, build strategic towers, and conquer impossible bosses with friends in the guild. Are you ready to defend the castle against hordes of enemies?

What We Love

  • 👍 Good gameplay mechanics
  • 🎨 Cute character designs
  • 🤝 Enjoyable co-op experience
  • 🕹️ Variety of game modes

Room to Improve

  • 🔁 Repetitive gameplay
  • 🔄 Difficulty spikes in higher levels
  • 🏆 Reliance on high-ranked players for progress
Days Bygone: Castle Defense#2

Days Bygone: Castle Defense by Frivolition Pte. Ltd.

Grow, Defend, Survive!
Strong Contender
🎮 Games
4.8😊(2.4K ratings)
FreeAdsIn-App Purchases
Days Bygone: Castle Defense screenshot 1
Days Bygone: Castle Defense screenshot 2
Days Bygone: Castle Defense screenshot 3
Days Bygone: Castle Defense screenshot 4
Days Bygone: Castle Defense screenshot 5
Days Bygone: Castle Defense screenshot 6

Embark on an endless defense journey against escalating enemy attacks. Upgrade defenses, unlock weapons, and recruit heroes to fortify your castle in the battle for survival! Start defending now and see how long you can withstand the relentless waves of enemies!

What We Love

  • 👍 Addictive and fun gameplay
  • 🚀 Offline progression and no forced ads
  • 🔒 No pay-to-win mechanics
  • 💎 Satisfying progression and upgrades

Room to Improve

  • 🐢 Slow progression and long rewind times
  • 🤖 Repetitive gameplay and lack of content updates
  • 🤔 Confusing or unclear mechanics
Realm Defense: Hero Legends TD#3

Realm Defense: Hero Legends TD by Babeltime Inc. US

Tower Defense Strategy Game
Worth Considering
🎮 Games
4.7😊(14K ratings)
FreeAdsIn-App Purchases
Realm Defense: Hero Legends TD screenshot 1
Realm Defense: Hero Legends TD screenshot 2
Realm Defense: Hero Legends TD screenshot 3
Realm Defense: Hero Legends TD screenshot 4
Realm Defense: Hero Legends TD screenshot 5
Realm Defense: Hero Legends TD screenshot 6

An engaging tower defense strategy game where players defend realms using heroes like dragons and wizards. Features over 300 levels, different worlds with unique towers, powerful heroes with special abilities, epic boss battles, and a variety of enemies to conquer. Download now for a free and fun gaming experience!

What We Love

  • 🚀 Enjoyable game
  • 👍 Free to play
  • 🚀 Lots of content and modes
  • 👍 Challenging but fair

Room to Improve

  • 💰 Progression gated behind paywall
  • 🐛 Crashes and bugs
  • ⏱️ Slow progression for F2P players

More Castle Defense Online apps to explore

4
Mobile Royale: Kingdom Defense
Mobile Royale: Kingdom Defense
Mobile Royale: Kingdom Defense
Online MMO & RPG Battle Games
Free

Experience epic battles, build a powerful kingdom, and forge alliances in a vast multiplayer online world where strategy is key. Join now to conquer realms and dominate in Mobile Royale: Kingdom Defense!

🎮 Games
(2.1K)
5
Grow Castle!
Grow Castle!
Grow Castle!
by YONG OK PARK
Free

Protect the castle from enemy attacks in this defense game by strategically placing heroes and upgrades in the castle tower. With over 80 heroes each possessing unique skills, aim to clear higher levels and compete for top rankings globally.

🎮 Games
(2.2K)
6
Defender II
Defender II
Defender II
by DROIDHEN LIMITED
Free

Defender II is a castle defense game where waves of monsters attack, and players must strategically use magic spells, towers, and defenses to protect their castle. Download the app now to experience powerful gameplay and thrilling challenges!

🎮 Games
(1.1K)
7
Kingdom Wars Defense!
Kingdom Wars Defense!
Kingdom Wars Defense!
Tower Defense
Free

Experience the ultimate Tower Defense game with Kingdom Wars Defense! Strategize to protect your castle from golems, orcs, and giants by commanding allies and upgrading weapons. With over 400 stages, 100 unique allies, and real-time decision-making, this game challenges your strategic skills like never before. Join the brave army now and save the Kingdom!

🎮 Games
(7.9K)
8
The Catapult 2: Castle defense
The Catapult 2: Castle defense
The Catapult 2: Castle defense
Crush! Stick man defence games
Free

Protect your castle from various enemies using a catapult and a variety of weapons in this tower defense game. With multiple game modes and strategic gameplay, defend your tower and emerge as a legendary master. Start playing now!

🎮 Games
(3.6K)
9
Crazy Kings Tower Defense Game
Crazy Kings Tower Defense Game
Crazy Kings Tower Defense Game
Fight Strategic TD Battles
Free

Embark on an epic tower defense strategy adventure in a popular CCG game with 1M+ downloads worldwide! Test your tactical skills with 600 challenging levels and over 90 cards to collect. Customize your army, heroes, spells, and equipment to save the kingdom from evil forces!

🎮 Games
(1.8K)
10
Tower Defense King
Tower Defense King
Tower Defense King
by MOBIRIX
Free

Experience the ultimate Tower Defense game now for free! Defend your kingdom against monsters using a variety of towers and magical abilities across 25 unique maps and three challenging modes. Take control of your destiny and dominate the global rankings in infinite mode. No wifi required!

🎮 Games
(412)
11
Crazy Defense Heroes: RPG TD
Crazy Defense Heroes: RPG TD
Crazy Defense Heroes: RPG TD
Tower Defense Strategy Game
Free

Embark on an epic tower defense adventure in a realm filled with minotaurs, dragons, and more in this strategic game. Customize your hero, build powerful clans, and lead your army to victory with over 400 cards and various tower defense strategies. Join the battle now!

🎮 Games
(8.1K)
12
Idle Kingdom Defense
Idle Kingdom Defense
Idle Kingdom Defense
Grow your Kingdom
Free

Embark on a medieval adventure in a castle defense RPG combining tower defense and large-scale battles. Command heroes, nurture your Archer Corps, conquer continents, and earn rewards even offline. Step into this mysterious world and protect your kingdom! Privacy Policy: [Privacy Policy Link](https:/stormxgames.com/policy/en/index.html?policy=privacy)

🎮 Games
(8K)
13
Tower War - Tactical Conquest
Tower War - Tactical Conquest
Tower War - Tactical Conquest
Use Military Strategy to Win!
Free

Engage in strategic warfare in this beautifully designed tower defense game where you must outsmart your enemies to conquer towers. Test your tactical skills, unlock new tower types, and dominate the battlefield. Join the battle now!

🎮 Games
(165K)
14
Bloons TD 6
Bloons TD 6
Bloons TD 6
Mega Popular Tower Defense
$6.99

Craft your perfect defense using powerful Monkey Towers and Heroes to pop invading Bloons in this popular tower defense game. Enjoy regular updates, boss events, odysseys, contested territory battles, quests, and customization options for endless strategic gameplay. Join millions of players in Bloons TD 6 now!

🎮 Games
(341K)
15
Castle Defender: Idle Defense
Castle Defender: Idle Defense
Castle Defender: Idle Defense
Choose your strategy
Free

Protect your royal castle from waves of enemies in this epic tower defense game. Summon strategic defenses and lead your heroes to victory with skills like archery and magic. Castle Defender: Idle Defense awaits your command!

🎮 Games
(122)
16
Castle Creeps TD
Castle Creeps TD
Castle Creeps TD
"Best Strategy Game of 2017"
Free

"Lead troops to victory in a fantasy mobile Tower Defense game. Prepare your defenses to save the kingdom from fierce Warlords and colossal Ogres. Download now to experience award-winning strategy gameplay!"

🎮 Games
(8.4K)
17
Castle Crumble
Castle Crumble
Castle Crumble
Creative destruction
Free

Embark on a conquest in various kingdoms to demolish castles using explosives and spells in an adventurous gameplay experience. Strategize, explore unique realms, and have a blast with physics-based fun. Conquer kingdoms with your tactics in Castle Crumble!

🎮 Games
(30K)
18
Boom Castle: Tower Defense TD
Boom Castle: Tower Defense TD
Boom Castle: Tower Defense TD
Idle Tower Defense TD Survival
Free

Survive and defend your castle in an exhilarating roguelike idle tower defense game against evil invaders like orcs and demons. Join powerful heroes, upgrade weapons, and strategically deploy traps to crush enemies in this epic offline adventure. Experience explosive excitement and strategic depth—bring on the boom!

🎮 Games
(7.9K)
19
Castle Crafter Survival Craft
Castle Crafter Survival Craft
Castle Crafter Survival Craft
online pixel world craft game
Free

Experience epic warfare in a pixelated world with Castle Crafter Survival Craft. Battle real players in various game modes like Capture The Flag and Team Deathmatch using weapons and strategic tactics. Download now for free and immerse yourself in this thrilling online crafting game!

🎮 Games
(17K)
20
Stronghold Kingdoms Castle Sim
Stronghold Kingdoms Castle Sim
Stronghold Kingdoms Castle Sim
The grand strategy castle MMO!
Free

Experience the ultimate grand strategy castle MMO where you become the Lord of the Middle Ages. Build your stronghold, wage war, forge alliances, and lead your faction to glory in a medieval world filled with players. Play for free on iPhone and iPad!

🎮 Games
(2.3K)

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