Castle Defense Online

Contains adsIn-app purchases
4.1
24.1K reviews
1M+
Downloads
Content rating
Everyone 10+
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About this game

Join the Ultimate Tower Defense Adventure!
The world's first real-time 4-player multiplayer defense game! Castle Defense Online!
Castle Defense Online offers an exciting and strategic experience where 4 players can play together in real-time, defending your base from waves of enemies. Whether you're a fan of tower defense games or multiplayer games, this action-packed RPG is perfect for you!

Features:
- Strategic Multiplayer Defense: Work as a squad in 2 player games or gather a team of 4 to battle it out in this thrilling co-op defense game.
- Easy & Intuitive Controls: Classic 2D side-scrolling action with simple controls that anyone can master. Perfect for those who love arcade and adventure games.
- Unique Characters & Powerful Skills: Collect a diverse set of heroes, each with their own special abilities, and create the ultimate tower defense strategy.
- Endless Growth: Customize your heroes with over 50 types of runes and climb through 20 tier levels. It's time to go beyond the limits!
- Challenging Bosses & Freaky Monsters: Prepare for epic battles against freakish bosses and hordes of jungle creatures.
- Build & Upgrade: Construct and upgrade your base and towers to withstand the toughest enemies in this immersive online experience.
- Adventure Time with Friends: Join or create rooms where you and your friends can play together, defending your base in a world full of imposters and hidden dangers.
- Free Games: Enjoy this free-to-play game that combines elements of strategy games, io games, and td mechanics, making it one of the most engaging multiplayer games out there.

Are you ready to face the reality of defending your base against overwhelming odds? Gather your squad, set up your defenses, and dive into the ultimate tower defense experience with Castle Defense Online.
Play together and see if you can survive the clash of enemies in this fast-paced adventure.

Perfect for:
If you’re a fan of the monkey defense genre or enjoy creating your own games with game maker tools, Castle Defense Online is a must-play. Perfect for those who love the thrill of popping bloons and engaging in brawl-style battles, or those who enjoy building and crafting like in multicraft.
Whether you're into hide and seek games or you’re a fan of classic 2D side-scrolling action with simple controls, this game offers an immersive experience you won’t want to miss.
Updated on
Mar 5, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.1
21.6K reviews
Cold Bolt
April 11, 2024
(Best game ever)- update I Loved this game when I was younger I used to check in every day with my guild and play with my friends but it makes me sad to see such an amazing game with so much potential go to waste from nothing more than a little polish or TLC. I would still recommend this game for anyone looking to have fun with friends or a long-term journey that is always progressing at the same pace. The option for in game transactions is where they got lost despite progressing fine without it
1 person found this review helpful
Kens Dormevil
May 24, 2022
It's good for what is is but a lot of improvements can be made. Like the explanation of certain items and what they do. Also, maybe add a single player defense where they come from one side or something. I know it's called Castle Defense ONLINE but sometimes, people don't have someone else to play with all the time. Maybe adding solo options to harder difficulty? Like on defense, have they come from one side only.
49 people found this review helpful
Nolan
March 2, 2022
This has potential to be a 5 star game with millions of downloads. It is not p2w, extremely fun/addicting, and has a decent community behind it. It just needs polishing and some tlc. A lot of the English is not correct and there's too much ambiguity throughout. It could do with a bit more minor content but overall the technical details need priority. I've emailed the manager about this but I'm yet to get a response. But don't let that stop you, this is a phenomenal game and worth supporting!
86 people found this review helpful

App support

Phone number
+821031778579
About the developer
Blackhammer
blackhammer.co@gmail.com
대한민국 18405 경기도 화성시 효행로 1060, 10층 1004호 A011 (병점동, 이타운4)
+82 10-5404-8761

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