Slime Castle Codes (October 2025)

Updated: October 2, 2025

We searched for new codes!

The slime kingdoms are in crisis, and your task is to evolve into a heroic slime by battling against evil humans. Explore different worlds, collect amazing equipment, and use Slime Castle codes for extra freebies like Gems, but try redeeming them before they expire.

All Slime Castle Codes List

Working Slime Castle Codes 

• LEAGUE: Free rewards (New)
• SLIME999: Free rewards
• GOLFPOWER: 10 Golf Power Potions
• SLIMEFUN: 10 Epic Chest Keys and 30 Lucky Wheel Tickets
• SUNDAYFM: 20 Auto Grind Ticket
• SLIME777: Lucky Wheel Tickets
• GUILDRAID: Free rewards
• SMILINGS: 10 Epic Chest Keys and 3 Epic Runes
• SLIM3TD: Free rewards
• TRYME2025: Free rewards
• WEEKLY: Free rewards
• LUCKY2025: 30 Lucky Wheel Tickets
• MONDAY175: Free rewards
• LOVE2025: 199 Hearts
• SLIME666: 200 Gems and 10 Epic Keys

Expired Slime Castle Codes 

• There are currently no inactive Slime Castle codes.

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How to Redeem Codes in Slime Castle

Redeeming codes for Slime Castle (available on Google Play and the App Store) will take only a few seconds if you follow the steps below:

1. Launch Slime Castle — Idle TD Game on your device and complete the tutorial.
2. Hit the settings button in the upper-right corner.
3. Choose the Redeem Code tab from the drop-down menu.
4. Insert a code into the text box.
5. Hit the Confirm button to claim your freebies.

If you want to grab more rewards in similar titles, you can always check out our Codes section here on Twinfinite!