Universal Tower Defense Codes for December 2025: Unlock Gems and Trait Rerolls

Universal Tower Defense codes can significantly speed up your acquisition of Gems and Trait Rerolls, allowing you to dive straight into the action instead of getting bogged down in grinding. Gems are essential for unlocking new units for your battles, so the faster you gather them, the smoother your combat experience will be. Additionally, Trait Rerolls enable you to equip your units with powerful perks, making your fights even more manageable.

Here’s a list of all the active codes currently available for Universal Tower Defense:

To start redeeming codes in Universal Tower Defense, you must first reach at least Level 5. Once you’ve achieved this milestone, follow these steps: