Castle Defense Online
September 21, 2025
More About 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.
Latest Version
2307
September 21, 2025
Black Hammer
Strategy
Android
1,345,930
Free
com.blackhammer.castledefense
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User Reviews
C H
4 years ago
Fun! Love the variety of games to play. Wish the skin for magician wasn't expensive. add more skins for all characters! Some more insturctions need to be added as well. Many players dont know how to change teams (click the flag BEFORE pressing the "ready" button) for the versus competition. & is it possible to still buy the other skills for your character? For example, I buy one skill for 10,000 diamonds. Then the other skill is now 10 times the price. Can I buy both and use both then? Fix chat
Felazz Crunch
3 years ago
Suggestion here can you guys make the time longer like 20sec or 30sec (when I press button to spawn the monsters)cause I don't have time to farm the jungle monster on the left and right (I think that's what you call them),buy items in the shop and read them oh the 3 guys on top right platform the quest .... Hope you guys understand what i'm saying
Logan Hornsby
3 years ago
I am amazed with this game, I never knew I could get to love a game so much I've been playing this game with my whole family and we all love it. I also love the challenge and the fact that you need to grind for money and exp. Also, what a brilliant job on the characters, there a alot of people to choose from with all unique features and combined with runes and relics to choose from people can share opinions on what to choose. AND THE GULD SYSTEM!! It's really good, I mean like 100/100. Best game
Helderick Ryan Herry
2 years ago
Edit my review again :D Once again I truly love this game! My friend and I were having a great time playing this game together. I love every hero and their skills. The game also has it own strategy like buying item to make you hero strong in order to defeat the enemy and there's also a gift everytime the game updated love that one. No complaints for now so far so good. I will be waiting for more heroes, item, new system and also gamemode!
Jacob Dommett
4 years ago
The game is very addictive and very fun but there is 1 problem that I can find. you dont see them often but... hackers, I think there should be an easy way to report them. For example, I got into a game with a hacker whose username is 8Z there are a few others but this is the most recent and only one I can remember. This is the only problem keeping it from 5 stars and I would appreciate this being fixed.
Pon Pon
4 years ago
It has a big potential, you need to fix the timer for enemies to respawn. increase it so that the player will be able to buy stuff from the shop more, Lower the prices in the shop or increase the money drop rate so that the player will be able to make unique builds, don't lock the quick start in a ranking wall because it will just turn off the players who want to join in a server
Duldulao, Karleigh
4 years ago
The game is great, 3 reasons why 1. How challenging it is - it keeps getting harder and harder, you really put to in an effort to clear them! 2. The community they have, it's very hospitable, you can request help on the difficulty you're having trouble on and they'll help. 3. The game is generous, providing rewards for free(no strings attached) during special occasions such as Christmas, Halloween, etc. All in all, despite how the game may look, it's addicting.
Dave Baran
4 years ago
This game is amazing and very addicting, I love the strategy aspect to it, but there are some things that need to be reworked to be a fully pledge 5 star game. The main problem im dealing with is the sudden jump of difficulty from easy to moderate. The easy difficulty is well, very easy, when you can easily defeat a diffuculty you go on to the next difficulty, which in this game is moderate, and for some reason, it feels like im playing on hard mode. The difficulty should be nerfed. Ty
benedict dy
1 year ago
Hello! I'm deeply inlove with the game and it's cute art styles. But I've just encountered a bug recently. And it's a very annoying one:( When I was about to buy a new hero my screen froze (probably because of lag or phone performance) so without any idea what happened I tried to click the buy button three times thinking it would fix the problem but it has made my diamonds negative -6k after purchasing (I had 3k diamonds). Please fix this bug so no others can experience it 😭🙏
M. Rafi Pramonoputra
4 years ago
I'm not smart enough to give thorough in-depth review, so let me just give my opinion as a gamer with only a 2gb RAM phone. This is the light online game I've always wanted. It has an exciting and intriguing online gameplay with real time interaction between players, and it is packed with actions, strategies, and long term character progression. These aspects normally can only be found in heavy online games with rich visual graphics, but with medium size, this game contains it all. Amazing work!
Huntsman MG
2 years ago
This game centers around a lot of grinding, whether you're aiming to improve your character or building up your guild, which can take quite a long time to fully maximize. The game can be quite confusing for beginners, and it would benefit from further development and more interesting features such as regular events or updates. Overall, while it has some enjoyable aspects, it can become repetitive and would benefit from more variety.
Hardcore Remixer
4 years ago
Game is awsome untill you realize how huge the gap between free to play and pay to win actually is. And that is when you notice how much the runes can impact the gameplay. You could add ad least some offline/single player levels like a campaign where you can get some rewards to actually impact your progress and not only to "I beat the easy mode alone! I only need to beat it 99 more times to get rich. Yay!". You get what I say. And yes, I doubt you would do anything about this gap.
paul ustic
1 month ago
they are shutting the US game down so I came to the global version to try out while waiting for my account transfer but I keep getting kicked out of the game after 2 games usually
Xian Kevin Agcaoili
1 month ago
it would have been 5 stars right now, until this problem I experienced an hour ago. I bought something in the events called "Losers have no say" with online cash and I expected it that I would have it now, but when I look at my inventory or hero skin, there's nothing there at all. I am not here to argue, but to inform my problem I am experiencing okay? :) I just want it to be fixed or maybe refunded since I don't wanna risk buying it twice. thank you, btw I love the game so much 😁 appreciate it
Nolan
3 years ago
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!
Purgis Fox
5 years ago
Great game The item system and the runes reminds me of League of Legends which i think is cool One issue i had was that the tutorial glitched out for me and so I never got to go through it Other than that I'm enjoying this game so far Keep it up. Also i wish there was a build maker in the game kind of like in league of legends where you can set up the list of equipments you will purchase before getting into a game. It would be more convenient.
Kens Dormevil
3 years ago
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.
Cold Bolt
1 year ago
(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
Dawson Duley
5 years ago
Game is good! Gameplay is good, the different classes are nice. And the graphics are good. Only problem is... It's a grinding game that gets really repetitive cause you just do the same thing over and over. Even if you DO get enough gems to get a new character it might not even be that fun. Other then that this game might be nice, and another thing this game needs advertising. There is not enough players to make it fun.
NEKO
4 years ago
The game is so much fun. I play this just about every day. A few things that I would change would be allowing more people in guilds, like you can barely have anyone in guilds until you level up the guild hall, which gets expensive after sometime. Another thing is that solo and easy modes are a piece of cake, but moderate is super difficult until you get a good grip on the game and understand what items and runes work best. Other than that, the game is amazing.
