Slime Castle: Idle TD RTS Game

Slime Castle: Idle TD RTS Game

Defend the kingdom from mobs!

8.5K ratings
773 reviews
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • May 3, 2024
  • August 11, 2026
Slime Castle: Idle TD RTS Game screenshot #1 for iPhone
Slime Castle: Idle TD RTS Game screenshot #2 for iPhone
Slime Castle: Idle TD RTS Game screenshot #3 for iPhone
Slime Castle: Idle TD RTS Game screenshot #4 for iPhone
Slime Castle: Idle TD RTS Game screenshot #5 for iPhone
Slime Castle: Idle TD RTS Game screenshot #6 for iPhone
Slime Castle: Idle TD RTS Game screenshot #7 for iPhone
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About

Defend a magical forest from invading humans in this idle tower defense RPG. Enhance your slime hero's abilities, collect legendary gear, and utilize powerful skills to defeat waves of enemies. Rebuild and strategize to protect the slime kingdoms.

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
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What users say

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+2

What's New in Slime Castle

3.3.4

August 11, 2026

- Fixed known bugs.

Subscription plans

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In-App Purchases

$6.29

5x Speed

5x Speed

Events

Read more about Guild War

Guild War

Battle alongside your guild!

Jul 13, 2026 Jul 31, 2026

Read more about 2º Aniversário

2º Aniversário

Celebre 2 anos incríveis de Slime Castle!

Jun 24, 2026 Jul 22, 2026

Read more about Relics Awaken

Relics Awaken

Summon powerful Relics in Slime Castle

May 29, 2026 Jun 26, 2026

User reviews

I’m gonna sound like a shill but the ads are worth it

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.
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계정 연동이 없어!!!

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

Good game, but…

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

Billchok

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.

Remove the adverts that don’t play

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Developer apps

User experience

🐞

Reported Bugs

4 issues

Disappearing progress and purchases

Bug

Ads not functioning properly

Bug

Unresponsive or freezing UI

Bug

Inconsistent drop rates and rewards

Bug

Requested Features

5 requests

More free slime options

Feature

Improved balance and progression

Feature

Multiplayer and social features

Feature

Better in-game guides and documentation

Feature

Optimization for tablet devices

Feature

FAQ

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.