# Castle Defense Online 4p — Castle Defense Online

> Real-time 4-player co-op tower defense with hero customization and base building. (iPhone/iPad app by donghwan kim.)

- Source: https://appshunter.io/ios/app/castle-defense-online-4p/id6569254484 (this page in markdown: same URL + `.md`)
- Developer: [donghwan kim](https://appshunter.io/developer/1498738213)
- Category: Games, Weather, Role Playing, Strategy
- Price: Free with in-app purchases
- Rating: 4.86/5 from 152 App Store ratings · 5 written reviews indexed
- Age rating: 9+
- Requires: iOS 12.0 · 196 MB
- Languages: English
- Released: 2024-08-25
- Data updated: 2026-06-10
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/castle-defense-online-4p/id6569254484/reviews.md

## What is Castle Defense Online 4p?

Join the Ultimate Tower Defense Adventure!
The world's first real-time 4-player co-op 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.

## Key features

- 4-player real-time co-op defense
- Strategic multiplayer squad battles
- Unique heroes with special abilities
- Hero customization with runes
- Base and tower construction/upgrades
- Challenging bosses and monsters

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Diamonds 1000 | $1.19 | one-time |
| Package No.1 | $6.00 | one-time |
| Diamonds 10000 | $9.00 | one-time |
| Diamonds 50000 | $30.00 | one-time |
| Diamonds 5000 | $5.00 | one-time |
| Diamonds 500 | $0.59 | one-time |
| Package No.2 | $6.00 | one-time |
| Package No.1 | $6.00 | one-time |
| Package No.3 | $6.00 | one-time |
| Package No.4 | $6.00 | one-time |
| Package No.5 | $6.00 | one-time |
| Package No.7 | $18.00 | one-time |
| Package No.8 | $18.00 | one-time |
| Package No.6 | $6.00 | one-time |
| Package No.9 | $18.00 | one-time |
| special skin | $5.00 | one-time |


## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/castle-defense-online-4p/id6569254484/reviews.md

### 5/5 — Amazing game BUT

*2025-06-19*

They recently remade this game for the “USA Only” version, and I lost all my progress from the original version. I love this game and spent a lot of time and a good bit of money on it as well. I want my progress back, but it’s not possible to get the global version that my progress is on

### 5/5 — Amazing

*2025-01-16*

Fun game play with friends I wish there was a survival mode with protecting the castle

### 5/5 — Good game

*2024-12-01*

Pretty good start honestly think I will have a a lot of fun

### 5/5 — Pretty good

*2024-11-29*

I’ve played played this in the past and I like the skills and leveling system. It’s a pretty well made rpg defense I would say.

### 5/5 — Amazing

*2024-09-14*

High quality game just for tutorial make an arrow to show where things are

## Frequently asked questions about Castle Defense Online 4p

### What is Castle Defense Online?

Castle Defense Online is a real-time 4-player co-op tower defense game. Players team up to defend their base from waves of enemies, utilizing strategic placement of towers and unique hero abilities.

### What are the key features of this game?

Key features include strategic multiplayer defense for up to 4 players, easy-to-master 2D side-scrolling controls, unique heroes with powerful skills, extensive hero customization with runes, challenging boss battles, and the ability to build and upgrade your base and towers.

### Is Castle Defense Online free to play?

Yes, the game is free to play. It combines elements of strategy, io, and TD mechanics. However, it does offer in-app purchases and has advertisements.

### What kind of devices is Castle Defense Online compatible with?

While specific OS requirements are not detailed, the description implies compatibility with mobile devices given its nature as a mobile application. It is designed for online play, suggesting a need for an internet connection.

### Who is this game perfect for?

This game is perfect for fans of tower defense games, multiplayer games, action RPGs, and those who enjoy cooperative gameplay. It's also suited for players who like strategic base building, hero customization, and classic 2D side-scrolling action.

## Version history (last 5 releases)

### 2187 — 2025-01-16

"2025-01-15
Other bug fixes"

### 2185 — 2024-12-18

"2024-12-18
Other bug fixes"

### 2180 — 2024-11-26

2024-11-27
Other bug fixes

### 2175 — 2024-11-05

2024-11-04
Other bug fixes

### 2170 — 2024-09-14

2024-09-13
Other bug fixes

## Apps similar to Castle Defense Online 4p

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Crazy Defense Heroes: RPG TD](https://appshunter.io/ios/app/crazy-defense-heroes-rpg-td/id1300027167) | 4.8 (8,069) | Free | Games |
| [Kingdom Rush Tower Defense TD](https://appshunter.io/ios/app/kingdom-rush-tower-defense-td/id516378985) | 4.8 (73,294) | Free | Games |

## More apps by donghwan kim

- [Castle Defense Online - 4p](https://appshunter.io/ios/app/castle-defense-online-4p/id1498738214)
- [길드키우기 : 운명의 소용돌이](https://appshunter.io/ios/app/id1573379452)
- [킹 온라인](https://appshunter.io/ios/app/id1629860723)

All apps by donghwan kim: https://appshunter.io/developer/1498738213

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*