Slime Castle — Idle TD Game

Contains adsIn-app purchases
4.4
57.8K reviews
1M+
Downloads
Content rating
PEGI 3
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About this 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
Updated on
Jun 27, 2025
Available on
Android, Windows*
*Powered by Intel® technology
Events & offers

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Location, Financial info and 3 others
This app may collect these data types
Location, Financial info and 3 others
Data isn’t encrypted
Data can’t be deleted

Ratings and reviews

4.4
55.8K reviews
K (Demontoastie)
January 21, 2025
Edit; Ads work maybe 15% of the time, which is INCREDIBLY frustrating as ads are 99% of how you can progress at a reasonable rate. I've been stuck at the same area for close to 3 months now because ads stopped working and progression is so slow without the boosts. Honestly love this game. While there 'isn't much to do', this type of phone game has a charm a lot have lost. I hope while the game continues to grow and change, it doesn't lose that simplicity.
96 people found this review helpful
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Azur Interactive Games Limited
January 21, 2025
Thank you for the objective criticism and interest in the development of the game! Our development team will definitely consider your opinion and make the game even better. Stay tuned for the updates! :)
Bob
January 21, 2025
So far the game ia really fun, but there is a bug i have found. When you complete a chapter you can watch an Ad (or skip the ad if you purchased the ad free version) for 1.5x gold. However it doesnt give 1.5x and often times doesn't even give the ammount of gold it is supposed to. I have screenshots and it seems it always give less than even the intended value. Hopefully they fix this problem as its quite abit of gold we are missing out on. Specially when you watch the ad and get less.
147 people found this review helpful
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Dyandrea Phoenix
October 5, 2024
The ads in the game are so frustratingly annoying. There are ads for everything, including increasing the level's speed to 3x. This would be fine if the ads weren't so extremely sensitive that you are almost always guaranteed to accidentally click on the ad, instead of closing it out. And if you do accidentally click on the ad and get taken out of the app, it will restart entirely and you do not receive any of the level goodies, which is more irritating when you are halfway through the level.
37 people found this review helpful
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Azur Interactive Games Limited
October 8, 2024
Hello! Ads help us to keep the game free. Thank you for understanding!

What’s new

- Added Travel Mode
- Improved the Shop UI, and added a daily 20-diamond reward at the top of the Booster page.
- Fixed Ring of Gale not working on Ninja Slime and Guild Slime.
- Fixed some localization errors.