# Slime Castle: Idle TD RTS Game — Defend the kingdom from mobs!

> Idle tower defense RPG where you defend a forest from human invaders as a slime hero. (iPhone/iPad app by Azur Interactive Games Limited.)

- Source: https://appshunter.io/ios/app/slime-castle-idle-td-rts-game/id6480410032 (this page in markdown: same URL + `.md`)
- Developer: [Azur Interactive Games Limited](https://appshunter.io/developer/1296347323)
- Category: Games, Entertainment, Casual, Strategy
- Price: Free with in-app purchases
- Rating: 4.90/5 from 8,468 App Store ratings · 778 written reviews indexed
- Age rating: 12+
- Requires: iOS 15.0 · 649 MB
- Languages: American English, Arabic, Bulgarian, Croatian, Czech, Danish, Dutch, Finnish, French (France), German (Germany) and 22 more
- Released: 2024-05-03
- Data updated: 2026-08-31
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/slime-castle-idle-td-rts-game/id6480410032/reviews.md

## What is Slime Castle?

The bad humans are invading the mysterious forest! The slime kingdoms in the forest are facing a tremendous crisis!

As a slime chosen by the Slime Sage, you can enhance your abilities through battles, collect legendary equipment, utilize powerful skills, defeat waves of terrifying enemies, and safeguard the peace of the forest.

Once you are defeated, come back stronger!

Slime Castle is a role-playing idle tower defense game.

Players could enjoy an excellent role development system, countless powerful weapons, and several impressive battle scenes.

==== Game Features  ====
-Auto-battle system with simple idle clicker gameplay. Enjoy a delightful time!
-Many distinctive maps and different enemies with unique skills. Explore more secrets of this world!. 
-Flexible and diverse upgrade system. Build your exclusive fortress! 
-Collect mighty equipment and level up the adorable slimes. Experience an extraordinary adventure! 
-Abundant free rewards to claim. No need to worry about gold anymore!
-Set battle strategy by combining fortress, equipments, and control enemies. Find the optimal methods to defeat your enemies!

Now let‘s start the epic idle adventure and embark on the path to become the greatest Slime Hero!

Experienced a problem? Got a suggestion? You can reach us at slimecastle@redtailworks.com

Terms of Use: https://azurgames.com/terms-of-use/
Privacy Policy: https://azurgames.com/privacy-policy/

## Key features

- Auto-battle idle clicker gameplay
- Distinctive maps and unique enemies
- Flexible and diverse upgrade system
- Collect mighty equipment and level up slimes
- Abundant free rewards
- Strategic fortress, equipment, and enemy control

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Auto Grind Card | $4.99 | per 7 days |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Super Monthly Card | $12.49 | one-time |
| 5x Speed | $6.29 | one-time |
| Newbie Pack | $3.79 | one-time |
| Ch.2 Pack | $3.90 | one-time |
| Ch.1 Pack | $2.49 | one-time |
| Remove Ads | $16.49 | one-time |
| Mining Slime Special Offer | $4.99 | one-time |
| Seven-day Special Event | $6.29 | one-time |
| Electric Slime Special Offer | $24.99 | one-time |
| Ultimate Pass | $24.99 | one-time |
| Ice Slime Special Offer | $12.49 | one-time |
| Common Newbie Pack | $3.99 | one-time |
| Premium Pass | $12.49 | one-time |
| Travel Special Pack 1 | $1.29 | one-time |
| Halloween Slime Special Offer | $12.49 | one-time |
| Explorer Vanguard Pack | $3.79 | one-time |
| Battle Pass | $24.99 | one-time |
| Travel Special Pack 2 | $3.90 | one-time |
| Glory Starter Pack | $1.29 | one-time |
| 3x Mining Speed | $4.99 | one-time |


## What do users think of Slime Castle?

Overall sentiment: mixed

**Pros**

- 🚀 Fun and addictive gameplay
- 👍 No forced ads
- 🚀 Decent progression system
- 🚀 Satisfying upgrade mechanics
- 👍 Generous free-to-play model

**Cons**

- 💰 Predatory in-app purchases
- 🐛 Progression walls and difficulty spikes
- 🐛 Inconsistent update rollouts
- 🐛 Bugs and glitches
- 🔍 Lack of transparency on mechanics

**Commonly reported bugs**

- Disappearing progress and purchases
- Ads not functioning properly
- Unresponsive or freezing UI
- Inconsistent drop rates and rewards

**Most requested features**

- More free slime options
- Improved balance and progression
- Multiplayer and social features
- Better in-game guides and documentation
- Optimization for tablet devices

## Recent user reviews (10 of 778)

All indexed reviews: https://appshunter.io/ios/app/slime-castle-idle-td-rts-game/id6480410032/reviews.md

### 1/5 — Dragon Orb hoard glitching

*2026-08-22, version 3.3.5*

I can’t find anywhere to report issues but the stupid orb drop will seize up with a connection symbol every other drop and will cause the ball to drop too late.

### 3/5 — It’s alright as a passive time passer.

*2026-08-21, version 3.3.5*

I like playing after work to pass the time but it’s pretty pay to win based.

### 1/5 — Nice game

*2026-08-21, version 3.3.5*

Very fun and challenging

### 1/5 — Без надежды на сохранения и поддержку

*2026-08-16*

Всё бы ничего, игра хоть и заточена на донат и на просмотры рекламы, но играбельна. 
Однако, при разборе ситуации сброса прогресса учетной записи с поддержкой оказалось, что в игре не работают сохранения, а поддержка, даже при предоставлении всей доступной информации об инциденте, или не в состоянии разобраться в своей же игре, или не имеет на это желания, постоянно ссылаясь на какой-то второй аккаунт, который им нужно предоставить, чтобы они что-то смогли сделать. 
А по факту, после сохранения и переустановки приложения, произошел сброс прогресса. Причем в гильдии остался этот же персонаж с тем же ником, что был до утери прогресса. У сброшенной учетки сохранились данные о полученных наградах, например в шахте. При вступлении в гильдию новым аккаунтом оказалось, что сброшенная учетка отображается как старая у учетка, у которой видна и сила и шмот до сброса. И онлайн накладывался учетки после сброса и у сетки до сброса. 
В общем, крайне не советую надеяться на то, что в случае инцидента с прогрессом, разработчик игры признает критический баг и как-то посодействует в восстановлении прогресса. Донатить, по этой же причине, тоже сомнительная затея, с учетом того, что в любой момент может оказаться, что всё нажитое погибло.

### 5/5 — Not a player friendly game

*2026-08-10, version 3.3.2*

If you expect to get anywhere and have fun you will pay money and lots of it.. the devs don’t care about the players as recently shown with the 2nd annual celebration. What they did was add more opportunities to buy more of their nonsense. Mind you, when you buy, you’ll need to keep buying. You will get No where quickly. I’ve stuck this stupid game out for over a year just to see me wait 24 hours to do anything exponential for my account and even longer to do anything worth while for my account…. Meaning.. I’d you plan to stick with this game and spend thousands of dollars, you will see some growth quickly… if you play this game because you think it might be fun for free with free ads, you are sorely mistaken…. Expect to start doing the same stupid nonsense for years with little reward to see little growth… take it for what I say but I’ve been doing the grind and I’ve keep getting shown that all the devs care about is tricking you into buying more… eventually this game will burn out.. I personally have seen hundreds leave to what I’m explaining now… good luck, enjoy your few months, don’t buy anything and see how quickly you decide NO. But stuff and see how quickly you decide never again… only time will tell.. good luck

### 5/5 — I’m gonna sound like a shill but the ads are worth it

*2026-07-31, version 3.2.7*

Now I never and I mean NEVER would say this without genuinely meaning it but this is the most surprisingly decent in-game ad system I’ve ever encountered in a mobile game.

And this is coming from me, frontline soldier on the anti-ad war.

Every single ad is optional. I’m certain if I wanted to I could just not see ads, but this is the only game I’ve ever tried (and I’ve tried so many lately as I’ve been recovering from surgery so my mobility has been limited the past couple months) where it feels genuinely worth it to click the ad button and then do something else for the next minute while leaving my phone muted and then when I pick it up again I’ve got a nice amount of rewards I can use to upgrade my stats or gear or what have you.

The game is fun and it feels like I’m making good progress consistently (we will see how this holds up over an extended period ofc, as I’ve only been playing for a couple days). The idle rewards building up even while playing is ingenious. The different mini game things are cute (I particularly like the gigas battles now that I’ve got some power in my slime). I was surprised by the slime town thingy and it’s piqued my interest enough to try to save materials for it. Unlocking my dragon skill was also a fun surprise.

This isn’t one of those gacha games where when you start they give you one of the current “best” characters or whatever to try and make newbies feel like they’re reaching longtime player level, but I think that’s for the best here. I only have two slimes right now and it doesn’t feel like I’m missing out. I don’t feel like I’m underpowered and I’m excited to eventually get more of them.

The ONLY thing I would want to add, and this is purely a personal idea, is the ability to have your own sort of “player slime”. Maybe not one that can be used in the battles so it doesn’t overshadow the character slimes, but one that represents you and can be customized with different colors and accessories. That would be really neat but that’s again a personal preference cuz I’m a big fan of customizable characters haha.

Genuinely would recommend. I hope the devs are having fun with it.

### 3/5 — 계정 연동이 없어!!!

*2026-07-30*

이런 게임종류에서 계정 연동이 없다는건 게임에 돈을 쓰고싶은 맘이 사라지게 만드는 원인임.

### 3/5 — Good game, but…

*2026-07-16, version 3.2.6*

I’ll admit, after a while the gameplay gets stale. I tried redownloading the game cuz i missed it, and i cant even get pass 40% on the loading screen whenever i boot up the game

### 1/5 — Billchok

*2026-07-16, version 3.2.6*

For the past few months, your game has been running really poorly; during every session, it crashes two or three times
I've been playing on a fairly recent iPad for three years now and everything was always fine, but not anymore, which is rather sad.

### 1/5 — Remove the adverts that don’t play

*2026-07-15, version 3.2.6*

^^^^^^^^^^^^^^^^^^*^^^^

## Frequently asked questions about Slime Castle

### What is Slime Castle: Idle TD RTS Game?

Slime Castle is a role-playing idle tower defense game where players defend a mysterious forest from invading humans. You play as a slime hero, enhancing abilities, collecting equipment, and using skills to defeat enemies.

### What are the main features of Slime Castle?

Key features include an auto-battle idle clicker system, diverse maps and enemies with unique skills, a flexible upgrade system for building your fortress, equipment collection, and strategic combinations of fortress, equipment, and enemy control.

### Is Slime Castle free to play?

The game is free to download and play, but it does offer in-app purchases and contains advertisements. This allows players to enhance their experience or progress more quickly.

### What kind of strategy is involved in Slime Castle?

Players can set battle strategies by combining their fortress defenses, collected equipment, and by controlling enemies. Finding optimal methods to defeat waves of enemies is a core part of the gameplay.

### What platforms is Slime Castle available on?

While not explicitly stated, the application data suggests it is a mobile application, typically available on iOS and Android devices.

## Version history (last 5 releases)

### 3.3.5 — 2026-08-20

- Fixed known bugs.

### 3.3.4 — 2026-08-11

- Fixed known bugs.

### 3.3.2 — 2026-08-08

1. Added a new mini-game: Dragon Orb Hoard.
2. Added SSS Fire Element Slime Fenicis and its artifact.
3. Added Chapter 20.
4. Added Mythic Artifacts to the Artifact Chest.
5. Optimized Guild War grouping logic.
6. Arena now shows real-time power.
7. Fixed known bugs.

### 3.2.7 — 2026-07-30

- Fixed known issues

### 3.2.6 — 2026-07-08

1. Added limited-time Relic Draw event.
2. Added a new Relic set: Demon Incarnation.
3. Added SSS Special Element Slime Noxraith.
4. Optimized claim restrictions for guild objective tasks.
5. Fixed known issues.

## Apps similar to Slime Castle

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## More apps by Azur Interactive Games Limited

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- [World War Heroes: WW2 FPS PVP](https://appshunter.io/ios/app/world-war-heroes-ww2-fps-pvp/id1281535229)

All apps by Azur Interactive Games Limited: https://appshunter.io/developer/1296347323

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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 2026-08-31.*