Slime Castle — Idle TD Game icon

Slime Castle — Idle TD Game v2.8.1

Contains ads • In-app purchases

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About this app

Developer Description

Become a Slime Hero! Defend forest against human invasion in the idle TD game!

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

What's New

1. Added the Arena module
2. Added a batch sweep feature to Gigas Battle
3. Improved game performance
4. Fixed other known issues

In-app purchases

$1.29 - $124.99 per item

Version Information

Version
2.8.1
Downloads
1M+
Updated on
Jan 22, 2026
Released
May 3, 2024
Requires
Android 6.0

Statistics

Google Play Rating History

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Slime Castle — Idle TD Game - Google Play Rankings

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#45 in Top Grossing Strategy in Vietnam

Slime Castle — Idle TD Game users say on Google Play

★★★★★
Emmanuel Alamo Emmanuel Alamo

love playing the game. it's simple and straight forward. f2p and p2p like every other game. I haven't had any issues really as far as game play goes. only issue I have is the ads that send you to the playstore, everytime they pop up, I already know it's going restart the game and I don't get the reward. those ads need to go. hate being forced into the play store and makes me not want to watch the ads for extra rewards. other then that, I'm digging the game.

13 Dec 5, 2025
★★★★
Regni Lamia Regni Lamia

It's a decent game to pass some time. The loop is addictive, and there's no forced ads (although they're pretty much required to progress efficiently). The only real negative I've found is, don't expect to be a competitive player without spending. But that's not uncommon with game development anymore and pretty much expected at this point. Would suggest at least giving it a try if you're interested in the genre.

2 Jan 5, 2026
★★★
Roll Fizzle-Beef Roll Fizzle-Beef

This game is pay to win. You can't make any progress unless you are willing to pay a lot of cash. Unfortunate as it was fun but each update has made the game worse and now it's impossible to make any progress if you are f2p.

3 Oct 27, 2025
★★
Alex Hauer Alex Hauer

It is largely pay to win. You cannot unlock the powerful slimes without spending money. The upgrade tree is incredibly limited as well. EDIT: Since the developers responded, I wish to make something exceptionally clear. The best slimes absolutely are barred behind purchases.

2 Jan 14, 2026
Anthony Fisher Anthony Fisher

Game has a subscription for grind tickets. You are supposed to get ' X ' amount EVERY DAY depending on the subscription. BUT YOU DO NOT GET THEM if you haven't used the previous days ones. If you aren't at 0 before server tick, you loose all the ones you haven't used! If you purchase just after server tick, you will loose ALL tickets when the pass expires! So you do NOT get all the tickets. I lost between 400 and 500 tickets from all 3 passes! DO NOT BUY. THOSE PASSES ARE BUGGED OR A SCAM!

15 Dec 12, 2025

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