Slime Castle — Idle TD Game
Contains adsIn-app purchases
star
67.6K reviews
PEGI 16
info
1M+
Downloads
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
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
Become a Slime Hero! Defend forest against human invasion in the idle TD game!
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Ratings and reviews
65.1K reviews
Dustin Hardin
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October 10, 2025
Update: They recently changed the mini games to be much more difficult so that they could sell their new mini game passes. I recommend not playing 🙏 Not F2P friendly. Decent fun for outrageous prices. Want a better (or new) character? You need to drop more than $30 for each one. There is only one high-ranking slime available for F2P players. The pull rates for upgrades are incredibly low considering the price they want you to pay.
92 people found this review helpful
Azur Interactive Games Limited
August 19, 2025
Hello! Making in-game purchases only speeds up your progress, it's not the only way to get ahead in the game. There are plenty of other ways to earn in-game resources. So, if you're an active player, you can still compete with others. Good luck!
Edin Ismani
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August 11, 2026
Hi everyone. started playing this game around december 2025 and the game was super fun that I spent well over 300 €. Game progress was ok, you had different set of items who were strong and you could progress in game, but then came the balancing update and it made this game so bad. now all you would want in this game is only 1 set of items which are worth it, the other 9 sets total rubbish after the balance. Do not get me wrong, support team was really really helpful for that only 2 stars.
2 people found this review helpful
Azur Interactive Games Limited
August 15, 2026
Hi! Thank you for your thoughts on game balance. We keep working on updates and new content for the game based on players' feedback, and we appreciate every opinion. We hope that you'll like future game updates!
randall hughes
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June 29, 2026
any and all competive things in game is all about how much money you spend. attack trading is supposed to tell what you need to know with info of attack, speed, and life. I was defeated by attack rated attack 4,000 less, attack 150k less, speed 1.5 less, life 150k less. but they had one of the most expensive slimes you can buy.
2 people found this review helpful
Azur Interactive Games Limited
July 1, 2026
Hello! We appreciate your strong feedback on the game's competitive aspects. Balancing gameplay and spending can be tricky, and your insights on attack trading are valuable. Thank you for sharing your thoughts, and we hope you continue to enjoy the game!
What’s new
1. Global-2 Adventure Card and Slime Skill unlock/advanced mechanism adjustments
2. Removal of the slime mutual exclusion mechanism among Expedition, Pickaxe Transport, and Travel Mode
3. Fixed known issues
2. Removal of the slime mutual exclusion mechanism among Expedition, Pickaxe Transport, and Travel Mode
3. Fixed known issues
App support
About the developer
AZUR INTERACTIVE GAMES LIMITED
support@azurgames.com
NIVIAN COURT, Floor 3, 16 John Kennedy
Nicosia 1087
Cyprus
+357 99 484236
